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La Paz County, Arizona, USAi
Regional Level Types
La Paz CountyCounty
ArizonaState
USACountry

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Key
Locality type:
Largest Settlements:
PlacePopulation
Quartzsite3,626 (2017)
Parker3,046 (2017)
Cienega Springs1,798 (2011)
Salome1,530 (2011)
Ehrenberg1,470 (2011)
Bouse996 (2011)
Other/historical names associated with this locality:
formerly the northern part of Yuma County
Other Languages:
French:
Comté de La Paz, Arizona, États-Unis
German:
La Paz County, Arizona, Vereinigte Staaten
Italian:
Contea di La Paz, Arizona, Stati Uniti d'America
Russian:
Ла-Пас, Аризона, Соединённые Штаты Америки
Simplified Chinese:
拉巴斯縣, 亞利桑那州, 美国
Spanish:
Condado de La Paz, Arizona, Estados Unidos
Albanian:
La Paz County, Arizona, Shtetet e Bashkuara të Amerikës
Amharic:
ላ ፓዝ ካውንቲ፥ አሪዞና, አሪዞና, አሜሪካ
Arabic:
مقاطعة لا باز, أريزونا, الولايات المتحدة
Armenian:
Լա Պաս շրջան, Արիզոնա, Ամերիկայի Միացյալ Նահանգներ
Basque:
La Paz konderria, Arizona
Bavarian:
La Paz County, Arizona, Vaoanigte Stootn
Bishnupriya Manipuri:
লা পাজ কাউন্টি, অ্যারিজোনা, তিলপারাষ্ট্র
Bulgarian:
Ла Паз, Аризона, Съединени американски щати
Cebuano:
La Paz County, Arizona (estado)
Croatian:
La Paz, Arizona, Sjedinjene Američke Države
Czech:
La Paz County, Arizona, Spojené státy americké
Danish:
La Paz County, Arizona, USA
Dutch:
La Paz County, Arizona (staat), Verenigde Staten
Estonian:
La Pazi maakond, Arizona, Ameerika Ühendriigid
Farsi/Persian:
شهرستان لاپاز، آریزونا, آریزونا, ایالات متحده آمریکا
Finnish:
La Pazin piirikunta, Arizona, Yhdysvallat
Hebrew:
לה פאז, אריזונה, ארצות הברית
Hungarian:
La Paz megye, Arizona, Amerikai Egyesült Államok
Irish Gaelic:
Contae La Paz, Arizona, Stáit Aontaithe Mheiriceá
Japanese:
ラパス郡, アリゾナ州, アメリカ合衆国
Limburgian:
La Paz County, Arizona, Vereinegde Staote vaan Amerika
Low Saxon/Low German:
La Paz County, Arizona, USA
Malayalam:
ലാ പാസ് കൗണ്ടി, അരിസോണ
Min Dong Chinese:
La Paz Gông, Arizona
Norwegian:
La Paz County, Arizona, USA
Polish:
Hrabstwo La Paz, Arizona, Stany Zjednoczone
Portuguese:
Condado de La Paz, Arizona, Estados Unidos
Romanian:
Comitatul La Paz, Arizona, Statele Unite ale Americii
Serbian:
Округ Ла Паз, Аризона, Сједињене Америчке Државе
Serbo-Croatian:
La Paz County, Arizona, Sjedinjene Američke Države
Swedish:
La Paz County, Arizona, USA
Turkish:
La Paz Kontluğu, Arizona, Amerika Birleşik Devletleri
Ukrainian:
Ла-Пас, Аризона, Сполучені Штати Америки
Urdu:
لا پاز کاؤنٹی، ایریزونا, ایریزونا, ریاستہائے متحدہ امریکا
Vietnamese:
Quận La Paz, Arizona, Chủng Quốc Hoa Kỳ
Waray:
Condado han La Paz, Arizona, Estados Unidos
Western Punjabi:
لا پاز کاؤنٹی, ایریزونا, امریکہ


La Paz County was established in 1983 when residents of the northern part of Yuma County voted to form a separate county. The name ("the peace" in Spanish) was taken from the ghost town of La Paz on the Colorado River, which forms the western boundary of the county.

The newly formed county encompasses a number of famous mineral localities, such as the Red Cloud mine, which formerly were within the boundaries of Yuma County. Specimen labels and literary references which were prepared prior to 1983 (and probably some prepared since) still place those localities in Yuma County.

Select Mineral List Type

Standard Detailed Gallery Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

Mineral list contains entries from the region specified including sub-localities

131 valid minerals. 1 erroneous literature entry.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Acanthite
Formula: Ag2S
Reference: [MinRec 21:160]
Actinolite
Formula: ☐Ca2(Mg4.5-2.5Fe0.5-2.5)Si8O22OH2
Description: Occurs with magnetite as replacement of limestone beds.
Reference: Galbraith, F.W. & Brennan (1959), Minerals of AZ: 39, 92.
Albite
Formula: Na(AlSi3O8)
Reference: MRDS database Dep. ID file #10027694, MRDS ID #M003845.
'Albite-Anorthite Series'
Reference: MRDS database Dep. ID #10259110, MRDS ID #TC00084; MAS ID #0040120006.
Alunite
Formula: KAl3(SO4)2(OH)6
Description: Occurs as branching, irregular veins within schistose dacite. Contains up to 4.3% Na2O.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 107, 310; Heineman, R.E.S. (1935), Sugarloaf Butte alunite, Engr. Mining Jour. 136: 138-139; Thoenen, J.R. (1941), Alunite resources of the United States, US Bur. Mines Rept. Inv. 3561; Wilson, E.D. (1944), Arizona non-metallics: A summary of past production and present operations, AZ Bur. Mines Bull. 152; Omori, K. & P.F. Kerr (1963), Infrared studies of saline sulfate minerals, Geol. Soc. Amer. Bull. 74: 709-734; Wilson, E.D. & G.H. Roseveare (1949), Arizona Nonmetallics, A Summary of Past Production and Present Operations, 2nd. Edition (revised), AZ Bur. Mines Bull. 155: 8; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 64.
Andalusite
Formula: Al2(SiO4)O
Description: Occurs as small crystalline masses in granite.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 110.
Anglesite
Formula: PbSO4
Localities: Reported from at least 14 localities in this region.
Reference: Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 68-70; Min.Rec.: 21: 158.
Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 167 (Table 4); Arizona Bureau of Mines file data.
'Apatite Supergroup'
Formula: IXM1VII2M23(IVTO4)3X (Z= 2)
Reference: Jungles collection specimen
Aragonite
Formula: CaCO3
Reference: [MinRec 21:160]
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: MRDS database Dep. ID file #10027694, MRDS ID #M003845.
Aurichalcite
Formula: (Zn,Cu)5(CO3)2(OH)6
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 123, 420.
Azurite
Formula: Cu3(CO3)2(OH)2
Localities: Reported from at least 7 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 122 (Table 4); Fernandez (1965); Arizona Bureau of Mines file data.
Baryte
Formula: BaSO4
Localities: Reported from at least 59 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 171 (Table 4); Arizona Bureau of Mines file data.
Bassanite
Formula: Ca(SO4) · 0.5H2O
Description: In veins in andesite assoc. with chrysocolla & tenorite
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 130.
'Bindheimite'
Formula: Pb2Sb2O6O
Reference: XRD analysis by Dr. Anthony Kampf.
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Description: Occurs as a biotite schist.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 395; Adams, J.W. & M.H. Staatz (1969), Rare earths and thorium, in Mineral and water resources of Arizona, AZ Bur. Mines Bull. 180: 245-251.
Bismite
Formula: Bi2O3
Description: Occurs in quartz.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 138; Galbraith, F.W. & Brennan (1959), Minerals of Arizona: 33.
Bismuthinite
Formula: Bi2S3
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 139.
Bismutite
Formula: (BiO)2CO3
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 139.
Bornite
Formula: Cu5FeS4
Localities: Reported from at least 13 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 142 (Table 4).
Brochantite
Formula: Cu4(SO4)(OH)6
Localities: Reported from at least 7 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 167 (Table 4); Arizona Bureau of Mines file data.
Calcite
Formula: CaCO3
Localities: Reported from at least 83 localities in this region.
Reference: Wilson, E.D. (1933), AZ Bur. of Mines Bull. 134: 67-68; Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, AZ Bur. Mines Bull. 158: 94; Min.Rec.: 21:158.
Calcite var. Iron-bearing Calcite
Formula: (Ca,Fe)CO3
Reference: [MinRec 21:162]
Calcite var. Manganese-bearing Calcite
Formula: (Ca,Mn)CO3
Localities: Reported from at least 12 localities in this region.
Reference: Wilson, E.D., et al (1934), AZ Bur. of Mines Bull. 134: 60-62; Min.Rec.: 21:161.
Caledonite
Formula: Pb5Cu2(SO4)3(CO3)(OH)6
Reference: Rocks & Min.: 61:55-56; MinRec 21:160.
Celestine
Formula: SrSO4
Localities: Reported from at least 7 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 171 (Table 4); Arizona Bureau of Mines file data.
Cerussite
Formula: PbCO3
Localities: Reported from at least 31 localities in this region.
Reference: Wilson, E.D. (1933), AZ Bur. of Mines Bull. 134: 67-68; Min.Rec.: 21:158; Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, AZ Bur. Mines Bull. 158: 94.
Cervantite
Formula: Sb3+Sb5+O4
Reference: Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 33.
Chalcanthite
Formula: CuSO4 · 5H2O
Reference: Collection Elmar Lackner
Chalcocite
Formula: Cu2S
Localities: Reported from at least 13 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 143 (Table 4).
Chalcopyrite
Formula: CuFeS2
Localities: Reported from at least 26 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 122 (Table 4); Fernandez (1965); Arizona Bureau of Mines file data.
Chlorargyrite
Formula: AgCl
Localities: Reported from at least 9 localities in this region.
Description: Principal silver ore mineral in oxidized lead ores; small disseminated masses and streaks within the oxidized minerals.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 177 (Table 4); Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 169; Wilson, E.D. (1933), AZ Bur. Mines Bull 134: 65-67; Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, AZ Bur. Mines Bull. 158: 91; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 42; Min.Rec.: 21:160.
'Chlorite Group'
Localities: Reported from at least 22 localities in this region.
Description: Small, irregular masses.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 176 (Table 4); Wilson, E.D. (1933), AZ Bur. of Mines Bull. 134: 57-59; Arizona Bureau of Mines file data.; Mineralogical Record- 21- 162
Chromite
Formula: Fe2+Cr3+2O4
Description: Occurs as disseminated grains & small masses with mariposite in mica schist.
Reference: Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 39.
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Localities: Reported from at least 48 localities in this region.
Habit: 2 mm fibers
Description: Occurs as crystals in this mine as fibers in vugs.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 173, 182; Min.Rec.: 20(5): 387.
'Chrysoprase'
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 170 (Table 4); Arizona Bureau of Mines file data.
Cinnabar
Formula: HgS
Localities: Reported from at least 7 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 156 (Table 4).
'Clays'
Reference: MRDS database Dep. ID file #10056447, MRDS ID #TC00263.
Clinoatacamite
Formula: Cu2(OH)3Cl
Reference: XRD-analysed as "anatacamite" (later found to be twinned clinoatacamite) by Dr. Anthony Kampf.
Conichalcite
Formula: CaCu(AsO4)(OH)
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 182.
'Conichalcite-Duftite Series'
Reference: Vik Vanrusselt collection (specimen identified as "Ca-Duftite or Pb-Conichalcite" by dealer)
Copper
Formula: Cu
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 144 (Table 4).
'Copper Stain'
Covellite
Formula: CuS
Reference: MRDS database Dep. ID file #10027694, MRDS ID #M003845.
Cummingtonite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Reference: The-Vug.com Collecting Minerals of La Paz County DVD
Cuprite
Formula: Cu2O
Localities: Reported from at least 7 localities in this region.
Description: In stringers and replacements in metamorphosed Paleozoic limestone nr. thrust-faulted Precambrian quartz schist.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 122 (Table 4); Arizona Bureau of Mines file data.
Cuprotungstite
Formula: Cu2(WO4)(OH)2
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 197; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 82.
Descloizite
Formula: PbZn(VO4)(OH)
Reference: Mineralogical Record 22:382
Diopside
Formula: CaMgSi2O6
Habit: Sparse
Colour: Very light-colored
Description: Coarse masses with sparse crystals along contact zones.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 205; Funnell, J.E. & E.J. Wolfe (1964), Compendium on nonmetallic minerals of AZ, Southwest Research Institute, San Antonio.
Dioptase
Formula: CuSiO3 · H2O
Localities: Reported from at least 8 localities in this region.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 205.
Djurleite
Formula: Cu31S16
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 238; Williams, S.A. & P. Matter, III (1975), Graemite, a new Bisbee mineral, Min.Rec.: 6:32-34.
Dolomite
Formula: CaMg(CO3)2
Description: As a bed several feet thick.
Reference: Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 51.
Duftite
Formula: PbCu(AsO4)(OH)
Reference: Randy Ernst Collecton
Dumortierite
Formula: (Al,Fe3+)7(SiO4)3(BO3)O3
Localities: Reported from at least 6 localities in this region.
Reference: Mineralogical Record- 21- 162
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Localities: Reported from at least 20 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 115 (Table 4); Arizona Bureau of Mines file data.
'Feldspar Group'
Reference: Jones, Jr., E.L. (1915), Gold Deposits near Quartzsite, Arizona, in Contributions to Economic Geology by F.L. Ransome & H.S. Gale, USGS Bull. 620: 57.
Fluorite
Formula: CaF2
Localities: Reported from at least 56 localities in this region.
Reference: Karl Volkman specimen.
Fornacite
Formula: Pb2Cu(CrO4)(AsO4)(OH)
Habit: Small rosette-like aggregates.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 225.
Galena
Formula: PbS
Localities: Reported from at least 32 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 171 (Table 4); Bancroft (1911): 90-91; Arizona Bureau of Mines file data.
Galena var. Silver-bearing Galena
Formula: PbS with Ag
Reference: Wilson, E.D. (1933), AZ Bur. of Mines Bull. 134: 67-68; Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, AZ Bur. Mines Bull. 158: 94; Galbraith, F.W. (1947), Minerals of AZ, AZ Bur. of Mines Bull. 153: 18.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 168 (Table 4); Bancroft (1911): 91-92; Arizona Bureau of Mines file data.
'Gismondine'
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 232.
Goethite
Formula: α-Fe3+O(OH)
Localities: Reported from at least 14 localities in this region.
Reference: Min.Rec.: 21: 158.
Gold
Formula: Au
Localities: Reported from at least 74 localities in this region.
Description: Free, lode gold.
Reference: AZ Bur. of Mines Bull. 134: 147.
Graemite
Formula: Cu[TeO3] · H2O
Description: In cavities in djurleite in quartz-tourmaline gangue.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 238; Williams, S.A. & P. Matter, III (1975), Graemite, a new Bisbee mineral, Min.Rec.: 6:32-34.
Gypsum
Formula: CaSO4 · 2H2O
Localities: Reported from at least 19 localities in this region.
Description: Occurs as gangue in veins in andesite.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 241; Foshag, W.F. (1919), Famous mineral localities: Yuma Co., AZ, Am.Min.: 4: 149-150; Rocks & Min.: 61:55-56; MinRec 21:160.
Gypsum var. Alabaster
Formula: CaSO4 · 2H2O
Reference: Phillips, K.A. (1987), Arizona Industrial Minerals, 2nd. Edition, Arizona Department of Mines & Minerals Mineral Report 4, 185 pp. MRDS database Dep. ID file #10023691, MRDS ID #I001099.
Gypsum var. Selenite
Formula: CaSO4 · 2H2O
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 115 (Table 4); Arizona Bureau of Mines file data.
Hematite
Formula: Fe2O3
Localities: Reported from at least 95 localities in this region.
Habit: Grouped crystals to 4 cm
Description: Occurs with Chrysocolla Spheres and small (1cm-) Quartz crystals, sometimes stained red. Occurs in very nice crystals
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 195, 246.
Hematite var. Specularite
Formula: Fe2O3
Localities: Reported from at least 17 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 123 (Table 4).
Hemimorphite
Formula: Zn4Si2O7(OH)2 · H2O
Habit: Small crystal groups
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 248; Edson, G.M. (1980), The Red Cloud mine, Yuma, AZ, Min.Rec.: 11: 141-152; Rocks & Min.: 61:55-56.
'Heulandite'
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 383.
'Hornblende'
Description: Coarsely crystalline in a hornblendite dike.
Reference: Wilson, E.D. (1933), AZ Bur. of Mines Bull. 134: 142-143.
Hydrocerussite
Formula: Pb3(CO3)2(OH)2
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 254.
'Hypersthene'
Formula: (Mg,Fe)SiO3
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 270; Reynolds, S.J. et al (1988), Geologic setting of Mesozoic and Cenozoic metamorphism in AZ, in W.G. Ernst (editor), Metamorphism and crustal evolution of the western United States. Ruby Vol. No. 7, Prentice Hall, NY: 466-501.
Jarosite
Formula: KFe3+ 3(SO4)2(OH)6
Reference: Specimen collected by Jerry A. Baird
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: MRDS database Dep. ID file #10040385, MRDS ID #M055134.
Kettnerite
Formula: CaBiCO3OF
Description: Masses in quartz veins with other bismuth minerals.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 139, 267.
'K Feldspar'
Reference: Hunt, W. (1983) Calciovolborthite from the New Water Mountains Yuma County, Arizona. Mineralogical Record 14:119
'K Feldspar var. Adularia'
Formula: KAlSi3O8
Reference: Hunt, W. (1983) Calciovolborthite from the New Water Mountains Yuma County, Arizona. Mineralogical Record 14:119
Kyanite
Formula: Al2(SiO4)O
Localities: Reported from at least 16 localities in this region.
Reference: [MinRec 21:162
Lazulite
Formula: MgAl2(PO4)2(OH)2
Reference: MRDS database Dep. ID file #10068360, MRDS ID #W001377.
Leadhillite
Formula: Pb4(CO3)2(SO4)(OH)2
Description: Crust on galena.
Reference: PXRD by John Attard, April 2018, on material from Pala International.
Lechatelierite
Formula: SiO2
'Lepidolite'
Reference: The-Vug.com Collecting Minerals of La Paz County DVD.
'Limonite'
Formula: (Fe,O,OH,H2O)
Localities: Reported from at least 41 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 123 (Table 4).
Linarite
Formula: PbCu(SO4)(OH)2
Reference: Rocks & Min.: 61:55-56; MinRec 21:160.
Litharge
Formula: PbO
Reference: [MinRec 21:160]
Magnesio-hornblende
Formula: ☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
Habit: Crystals to more than 1 inch (2.5 cm) long
Description: Occurs as crystals near dikes in Precambrian granite.
Reference: Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 92.
Magnetite
Formula: Fe2+Fe3+2O4
Localities: Reported from at least 16 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 150 (Table 4); Bancroft (1911): 95-97; Arizona Bureau of Mines file data.
Magnetite var. Titaniferous Magnetite
Formula: Fe2+(Fe3+,Ti)2O4
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 151 (Table 4).
Malachite
Formula: Cu2(CO3)(OH)2
Localities: Reported from at least 40 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 177 (Table 4); Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, AZ Bur. Mines Bull. 158: 91; Rocks & Min.: 61:55-56; Min.Rec.: 21:160.
Manandonite
Formula: Li2Al4(Si2AlB)O10(OH)8
Habit: Minute tabs
Description: traced back the reference to material collected by Sid Williams, Dick Bideaux and and Dick Thomssen circa 1960, apparently identified by optical methods only. Samples of that material were housed at the University of Arizona and were recently X-rayed by Bob Downs and found to be muscovite. Minute tabs in quartzite with kyanite, etc.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 287; Bideaux, R.A., et al (1960), Some new occurrences of minerals of AZ, AZ Geol. Soc. Digest: 3: 53-56.
Manganite
Formula: Mn3+O(OH)
Localities: Reported from at least 11 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 114 (Table 4); Farnham & Stewart (1958): 68-70; Arizona Bureau of Mines file data.
Massicot
Formula: PbO
Localities: Reported from at least 12 localities in this region.
Reference: Wilson, E.D. (1933), AZ Bur. Mines Bull. 134: 68-70; Min.Rec.: 21: 158.
Metacinnabar
Formula: HgS
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 156 (Table 4).
'Mica Group'
Reference: MRDS database Dep. ID file #10064184, MRDS ID #TC38460.
Mimetite
Formula: Pb5(AsO4)3Cl
Localities: Reported from at least 8 localities in this region.
Habit: Small (1 mm) doubly-terminated crystals
Colour: Red
Description: Crystalline masses.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 248; Edson, G.M. (1980), The Red Cloud mine, Yuma, AZ, Min.Rec.: 11: 141-152; Dana 6: 1094; Min.Rec .: 21:160.
Minium
Formula: Pb3O4
Localities: Reported from at least 7 localities in this region.
Reference: Rocks & Min.: 61:55-56; MinRec 21:160.
Molybdofornacite
Formula: Pb2Cu(MoO4,CrO4)(AsO4,PO4)(OH)
Habit: Bladed
Description: As bladed crystals assoc. with orange mimetite.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 303.
Montmorillonite
Formula: (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Reference: Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 109.
Mordenite
Formula: (Na2,Ca,K2)4(Al8Si40)O96 · 28H2O
Reference: Mineralogical Record 20:387-399
Murdochite
Formula: PbCu6O8-x(Cl,Br)2x where x
Reference: Hunt, W. (1983) Calciovolborthite from the New Water Mountains Yuma County, Arizona. Mineralogical Record 14:119
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Localities: Reported from at least 18 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 154 (Table 4); Dale (1959): 7-8.
Muscovite var. Mariposite
Formula: K(Al,Cr)2(Al,Si)4O10(OH)2
Description: Occurs disseminated in mica schist with chromite.
Reference: Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 39, 104.
Muscovite var. Phengite
Formula: KAl1.5(Mg,Fe)0.5(Al0.5Si3.5O10)(OH)2
Description: Occurs disseminated in mica schist with chromite.
Reference: Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 39, 104.
Muscovite var. Sericite
Formula: KAl2(AlSi3O10)(OH)2
Localities: Reported from at least 12 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 172 (Table 4); Bancroft (1911): 51; Wilson, et al (1934) (revised 1967): 128; Arizona Bureau of Mines file data.
Natroalunite
Formula: NaAl3(SO4)2(OH)6
Description: Occurs in schistose & porphyritic dacite intruding Mesozoic schist.
Reference: Ref.: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 161 (Table 4); Arizona Bureau of Mines file data.
Naumannite
Formula: Ag2Se
Description: Small beads within massive djurleite in quartz veins.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 311.
Opal
Formula: SiO2 · nH2O
Reference: Dana 6: 1094.
Opal var. Opal-AN
Formula: SiO2 · nH2O
Reference: Dana 6: 1094.
Orthoclase
Formula: K(AlSi3O8)
Reference: Jones, Jr., E.L. (1915), Gold Deposits near Quartzsite, Arizona, in Contributions to Economic Geology by F.L. Ransome & H.S. Gale, USGS Bull. 620: 45-57.
'Petrified Wood'
Description: Abundant along the river banks.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 350; Guild, F.N. (1910), The Mineralogy of AZ, The Chemical Publishing Co., Easton, PA.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Description: as pseudo-hexagonal tabular phenocrysts in the host rhyolite, somewhat altered to vermiculite in some instances.
Reference: Jungles collection specimen
Plancheite
Formula: Cu8(Si8O22)(OH)4 · H2O
Description: Occurs in quartz.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 330.
Plattnerite
Formula: PbO2
Habit: Minute needles
Colour: Black
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 331; Edson, G.M. (1980), The Red Cloud mine, Yuma, AZ, Min.Rec.: 11: 141-152; Rocks & Min.: 61:55-56; Min.Rec.: 21: 160.
Posnjakite
Formula: Cu4(SO4)(OH)6 · H2O
Description: Per Anthony, et al - Nat. History Museum, London specimen #1972,201.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 333.
Prosopite
Formula: CaAl2F4[(OH)4-xFx], x = 0.0–1.0
Habit: crystals to 6 mm long.
Colour: Limpid sea-green
Description: Occurs in voids in hematite gangue in hematite veins in andesite.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 335.
Pseudomalachite
Formula: Cu5(PO4)2(OH)4
Reference: C. Lemanski, Jr. collection (6814CL).
'Psilomelane'
Formula: Mn, O
Localities: Reported from at least 21 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 114 (Table 4); Farnham & Stewart (1958): 68-70; Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 338; Ipsen, A.D. & H.L. Gibbs (1952), Concentration of oxide manganese ore from Doyle-Smith claims, northern Yuma Co., AZ, US Bur. Mines Rept. Inv.: 4844; Arizona Bureau of Mines file data.
Pyrargyrite ?
Formula: Ag3SbS3
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 168 (Table 4); Bancroft (1911): 89-90; Arizona Bureau of Mines file data.
Pyrite
Formula: FeS2
Localities: Reported from at least 30 localities in this region.
Description: Disseminated in schist in vein walls.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 144 (Table 4).
Pyrite var. Gold-bearing Pyrite
Formula: FeS2
Localities: Reported from at least 8 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 151 (Table 4).
Pyrolusite
Formula: Mn4+O2
Localities: Reported from at least 38 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 180 (Table 4); Farnham & Stewart (1958): 79; Arizona Bureau of Mines file data.
Pyromorphite
Formula: Pb5(PO4)3Cl
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 343; Univ. of AZ Bull. 41 (1916-17), Mineralogy of Useful Minerals in AZ: 51.
Pyrophyllite
Formula: Al2Si4O10(OH)2
Localities: Reported from at least 9 localities in this region.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 386.
Quartz
Formula: SiO2
Localities: Reported from at least 69 localities in this region.
Reference: Mineralogical Record 19:331-338
Quartz var. Agate
Reference: Blair, 1992. Rockounding Arizona, p.149.
Quartz var. Agate-Jasper
Formula: SiO2
Reference: Zeitner, J. C. 1964 Treasures of the Desert: Lapidary Journal, v. 17, no. 11, p. 1082-1089.
Quartz var. Amethyst
Formula: SiO2
Reference: [MinRec 21:160]
Quartz var. Blue Quartz
Formula: SiO2
Reference: Rolf Luetcke
Quartz var. Chalcedony
Formula: SiO2
Localities: Reported from at least 8 localities in this region.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 166 (Table 4); Farnham & Stewart (1958): 72; Arizona Bureau of Mines file data.
Quartz var. Fire Agate
Formula: SiO2
Reference: Peirce, H.W. (1969) Gem Materials, in USGS & Arizona Bureau of Mines, and U.S. Bureau of Reclamation, Mineral and Water Resources of Arizona, Arizona Bureau of Mines Bull. 180 (USGS Bull.871): 359. MRDS database Dep. ID file #10023619, MRDS ID #I000808.
Quartz var. Jasper
Localities: Reported from at least 12 localities in this region.
Reference: Simpson, B., and Mitchell, J. R. 1989 Gem Trails of Arizona: Gem Guides Book company, Baldwin Park, California, 124 p.
Quartz var. Milky Quartz
Formula: SiO2
Description: Very cellular & crystalline in places.
Reference: Wilson, E.D. (1933), AZ Bur. Mines Bull. 137: 70-71; Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, AZ Bur. Mines Bull. 158: 89.
Quartz var. Moss Agate
Formula: SiO2
Reference: Zeitner, J. C. 1964 Treasures of the Desert: Lapidary Journal, v. 17, no. 11, p. 1082-1089.
Quartz var. Rock Crystal
Formula: SiO2
Reference: MRDS database Dep. ID file #10065031, MRDS ID #TC40020.
Romanèchite ?
Formula: (Ba,H2O)2(Mn4+,Mn3+)5O10
Description: Visual identification. No data.
Reference: PMB collection
Rutile
Formula: TiO2
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 270; Reynolds, S.J. et al (1988), Geologic setting of Mesozoic and Cenozoic metamorphism in AZ, in W.G. Ernst (editor), Metamorphism and crustal evolution of the western United States. Ruby Vol. No. 7, Prentice Hall, NY: 466-501.
Sapphirine
Formula: Mg4(Mg3Al9)O4[Si3Al9O36]
Description: Tentatively identified via optical means.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 361; Wilson, E.D. (1929), An occurrence of dumortierite near Quartzsite, AZ, Am.Min.: 14: 373-381.
Scheelite
Formula: Ca(WO4)
Localities: Reported from at least 26 localities in this region.
Reference: [www.johnbetts-fineminerals.com]
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Colour: Black
Description: Massive material with scheelite in quartz.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 400; Dale, V.B. (1959), Tungsten deposits of Yuma, Maricopa, Pinal, and Graham Cos., AZ, US Bur. Mines Rept. Inv. 5516: 24-25.
Sepiolite
Formula: Mg4(Si6O15)(OH)2 · 6H2O
Description: Originally labelled "Mountain Cork/ Palygorskite?" (perhaps related to sepiolite occurence listed for Santa Maria river basin in neighboring Yavapai Co.?)
Reference: Anne Seminaris specimen; John Attard PXRD.
Shattuckite
Formula: Cu5(Si2O6)2(OH)2
Reference: The Mineralogical Record - Volume 11 - Page 263
Siderite
Formula: FeCO3
Localities: Reported from at least 18 localities in this region.
Colour: Nearly jet-black
Description: Cleaveable material.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 143 (Table 4); Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 48.
Sillimanite
Formula: Al2(SiO4)O
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 270; Reynolds, S.J. et al (1988), Geologic setting of Mesozoic and Cenozoic metamorphism in AZ, in W.G. Ernst (editor), Metamorphism and crustal evolution of the western United States. Ruby Vol. No. 7, Prentice Hall, NY: 466-501.
Silver
Formula: Ag
Description: Alloyed with placer gold.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 157 (Table 4).
Smithsonite
Formula: ZnCO3
Localities: Reported from at least 15 localities in this region.
Reference: Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, AZ Bur. Mines Bull. 158: 91; Min.Rec.: 21:160.
Sphalerite
Formula: ZnS
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 149 (Table 4); Dale (1959): 15-16; Arizona Bureau of Mines file data.
Sphalerite var. Marmatite
Formula: (Zn,Fe)S
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 178 (Table 4); Arizona Bureau of Mines file data.
'Stetefeldtite'
Formula: Ag2Sb2(O,OH)7
Colour: Yellow
Description: Powder or crusts on wulfenite.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 381; Edson, G.M. (1980), The Red Cloud mine, Yuma, AZ, Min.Rec.: 11: 141-152; Rocks & Min.: 61:55-56.
'Stibiconite'
Formula: Sb3+Sb5+2O6(OH)
Reference: Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 33.
Stibnite
Formula: Sb2S3
Habit: Radiating bladed crystals.
Description: Partially altered to cervantite & stibiconite.
Reference: Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 33.
'Stilbite subgroup'
Formula: (Na/Ca/K)6-7[Al8-9Si27-28O72] · nH2O
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 383.
Stolzite
Formula: Pb(WO4)
Reference: Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 82.
Svanbergite
Formula: SrAl3(PO4)(SO4)(OH)6
Description: In pyrophyllite with hematite.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 386.
Sylvanite ?
Formula: (Au,Ag)2Te4
Description: Reported.
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 149 (Table 4); Arizona Bureau of Mines file data.
Talc
Formula: Mg3Si4O10(OH)2
Reference: MRDS database Dep. ID file #10056453, MRDS ID #TC00272.
Tangeite
Formula: CaCu(VO4)(OH)
Reference: [MinRec 14:119]
Teineite
Formula: Cu2+(Te4+O3) · 2H2O
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 238; Williams, S.A. & P. Matter, III (1975), Graemite, a new Bisbee mineral, Min.Rec.: 6:32-34.
Tellurium
Formula: Te
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 390.
Tenorite
Formula: CuO
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd. ed.: 335.
Tetradymite
Formula: Bi2Te2S
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 392.
'Tetrahedrite Subgroup'
Formula: Cu6(Cu4X2+2)Sb4S12S
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 156 (Table 4).
Thomsonite-Ca
Formula: NaCa2[Al5Si5O20] · 6H2O
Reference: Hunt, W. (1983) Calciovolborthite from the New Water Mountains Yuma County, Arizona. Mineralogical Record 14:119
Thorite
Formula: Th(SiO4)
Description: Occurs in small amounts in a quartz vein that cuts a biotite schist.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 395; Adams, J.W. & M.H. Staatz (1969), Rare earths and thorium, in Mineral and water resources of Arizona, AZ Bur. Mines Bull. 180: 245-251.
Tocornalite
Formula: (Ag,Hg)I
Colour: Green
Description: Massive material that darkens to black on exposure to light.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 398; Bancroft, P. & G. Bricker (1990), Arizona's silver mining district, Min.Rec.: 21: 151-168
Topaz
Formula: Al2(SiO4)(F,OH)2
Reference: Grant, Raymond W., Bideaux, R.A., and Williams, S.A. (2006) Minerals Added to the Arizona List 1995-2005: 9.
'Tourmaline'
Formula: A(D3)G6(Si6O18)(BO3)3X3Z
Reference: Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 170 (Table 4); Dale (1959): 24-25; Arizona Bureau of Mines file data.
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Description: Occurs as an asbestosform variety in marbleized limestones.
Reference: Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 92.
Urea
Formula: CO(NH2)2
Reference: A.R. Kampf
Vanadinite
Formula: Pb5(VO4)3Cl
Localities: Reported from at least 19 localities in this region.
Reference: No reference listed
Vermiculite
Formula: Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 413.
'Wad'
Reference: Galbraith, F.W.& D.J. Brennan (1959), Minerals of AZ: 32.
Wagnerite
Formula: (Mg,Fe2+)2(PO4)F
Reference: Grant, Raymond W., Bideaux, R.A., and Williams, S.A. (2006) Minerals Added to the Arizona List 1995-2005: 9.
Weissite
Formula: Cu2-xTe
Description: Trace amounts with blebs of bornite in massive djurleite in a quartz-tourmaline gangue.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 418; Williams, S.A. & P. Matter, III (1975), Graemite, a new Bisbee mineral, Min.Rec.: 6: 32-34.
Wickenburgite
Formula: CaPb3Al2Si10O24(OH)6
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 419; Bancroft, P. & G. Bricker (1990), Arizona's silver mining district, Mineralogical Record: 21: 151-168; Min.Rec.: 21: 160.
Willemite
Formula: Zn2SiO4
Localities: Reported from at least 10 localities in this region.
Habit: Doubly-terminated, prismatic
Colour: Colorless
Fluorescence: Bright creamy yellow (SW UV)
Description: Numerous crystal prisms line cavities in matrix.
Reference: Self-collected: C. Lemanski; J. Ebner; E. Stuart; R. DuBlois; S. Misiur.
'Wolframite'
Formula: (Fe2+)WO4 to (Mn2+)WO4
Habit: Large, platy; over 5 cm long
Description: Occurs in a quartz muscovite vein.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 363, 423.
Wollastonite
Formula: CaSiO3
Description: Replaced an entire bed of limestone.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 424; Bancroft, H. (1911), Reconnaissance of the ore deposits in northern Yuma Co., AZ, USGS Bull. 451; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 91.
Wulfenite
Formula: Pb(MoO4)
Localities: Reported from at least 22 localities in this region.
Habit: Tabular to 2 inches (5 cm) on edge
Colour: Bright red-orange
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 381, 425; Wilson, E.D., et al (1951), Arizona zinc and lead deposits, part II, AZ Bur. Mines Bull. 158: 91; Bideaux, R.A. (1972), The collector (on wulfenite), Min.Rec.: 3: 148-150, 198-201; Blake, W.P. (1881a), Vanadinite in AZ, Am. Jour. Sci.: 22: 235; Silliman, B. (1881), Mineralogical notes, Amer. Jour. Sci.: 22: 198-205; Wilson, E.D. (1933), AZ Bur. Mines Bull 134: 65-67; Foshag, W.F. (1919), Famous mineral localities: Yuyma Co., AZ, Am.Min.: 4: 149-150; Edson, G.M. (1980), The Red Cloud mine, Yuma, AZ, Min.Rec.: 11: 141-152; Keith, Stanton B. (1978) State of Arizona Bureau of Geology and Mineral Technology, Geol. Sur. Br. Bull. 192, Index of Mining Properties in Yuma Co., Arizona: 177 (Table 4); Fleischer, M. (1959), The geochemistry of rhenium, with special reference to its occurrence in molybdenite, Econ.Geol.: 54: 1406-1413; Wilson, W.E. (1985), What's new in minerals?, Mineralogical Record: 16: 497-500; Rocks & Min.: 61:55-56; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 80.
Zoisite
Formula: Ca2Al3[Si2O7][SiO4]O(OH)
Description: Occurs in wall rocks of cinnabar veins.
Reference: Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 432; Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 99.
Zunyite
Formula: Al13Si5O20(OH,F)18Cl
Habit: Crystals to 2 cm on an edge.
Colour: Buff-colored
Description: Transparent crystals.
Reference: Galbraith. F.W. & D.J. Brennan (1959), Minerals of AZ: 93; Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 432; Wilson, W.E. (1986), What's new in minerals, Min.Rec.: 17: 210, 404-405.

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