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Maryland, USAi
Regional Level Types
MarylandState
USACountry

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Neighbouring regions:
Locality type:State
Largest Settlements:
PlacePopulation
Baltimore621,849 (2018)
Columbia99,615 (2011)
Germantown86,395 (2011)
Silver Spring71,452 (2011)
Frederick69,479 (2017)
Waldorf67,752 (2011)


One of the thirteen original states of the USA.

Maryland's geological diversity is impressive for such a small state and can serve as a cross-section for Appalachian geology. Going from west to east, the state contains a portion of the Allegheny Plateau in Garrett County, the folded Valley and Ridge Province, the Blue Ridge just west of Frederick, a Triassic-Jurassic Fault basin, Piedmont Plateau igneous and metamorphic rocks and the Cretaceous to Quaternary Coastal Plain province. Estuarine and coastal landforms also are well developed along the Chesapeake Bay and Atlantic coastline.

Some of the state's more notable mineral collecting localities are as follows. Many interesting minerals are found in the state's ultramafic rocks such as those exposed in the Hunting Hill Quarry in Montgomery County, the Bare Hills in Baltimore County and numerous pits worked for chromite, talc and verde antique in Harford and Cecil Counties. Several interesting old copper mine districts occur in Baltimore, Carroll and Frederick Counties, including the type locality for carrollite. Gold deposits near Great Falls in Montgomery County have fueled several small gold rushes. The Cambrian Cockeysville marble furnishes interesting collecting in quarries in Baltimore and Howard Counties. The Piedmont Plateau rocks contain collectable metamorphic minerals such as garnet, staurolite and kyanite. Selenite gypsum crystal clusters, iron phosphates (vivianite mainly) nodules have been found in the Coastal Plain province in Prince Georges and other Counties.

The urban to suburban nature of the state means that old deposits are frequently obscured or obliterated by development. However the diverse geology renders of interest any new exposure, even if only temporarily available for collecting and study.

Select Mineral List Type

Standard Detailed 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

164 valid minerals. 1 (TL) - type locality of valid minerals. 3 (FRL) - first recorded locality of unapproved mineral/variety/etc. 2 erroneous literature entries.

Rock Types Recorded

Note: this is a very new system on mindat.org and 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:

''
Localities:
Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Localities: Reported from at least 17 localities in this region.
Albite
Formula: Na(AlSi3O8)
Localities: Reported from at least 23 localities in this region.
Albite var: Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
'Albite-Anorthite Series'
Localities: Reported from at least 11 localities in this region.
'Allanite Group'
Formula: {A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Almandine
Formula: Fe2+3Al2(SiO4)3
'Almandine-Spessartine Series'
'Alum Group'
Formula: XAl(SO4)2 · 12H2O
Reference: Ref: Minerals of the Washington, D.C Area.
'Amber'
Reference: Kunz,1892. Gems & Precious Stones of N. America, p.199.; D. M. Schlegal (1959) Gem Stones of the United States. USGS Bulletin 1042G
'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Amphibole Supergroup var: Byssolite'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Habit: fibrous
Colour: green
Description: Actinolite-Tremolite (var. byssolite) in quartz veins and massive, is rather attractive in the veins.
Reference: Matthew Neuzil
Analcime
Formula: Na(AlSi2O6) · H2O
Anglesite
Formula: PbSO4
Anhydrite
Formula: CaSO4
Reference: Ostrander, C. W. & W. E. Price Jr. (1940) Minerals of Maryland: Natural History Society of Maryland, 92 p.
Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Anthophyllite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Localities: Reported from at least 7 localities in this region.
Antigorite
Formula: Mg3(Si2O5)(OH)4
Localities: Reported from at least 9 localities in this region.
Antigorite var: Williamsite
Formula: Mg3(Si2O5)(OH)4
Localities: Reported from at least 6 localities in this region.
'Apatite'
Localities: Reported from at least 12 localities in this region.
'Apophyllite'
Reference: Ostrander, C. W. & W. E. Price Jr. (1940) Minerals of Maryland: Natural History Society of Maryland, 92 p.
Aragonite
Formula: CaCO3
Localities: Reported from at least 6 localities in this region.
Arfvedsonite
Formula: [Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
Description: described as Riebeckite-arfvedsonite as green radiating crystals on quartz
Reference: Mines of the Washington D.C Area
Arsenopyrite
Formula: FeAsS
Reference: Nagy,J. & F. J. Parker (2013) The Maryland Mine: Maryland's last underground gold mine: Rocks and Minerals: 88 (5): 448-460
'Asbestos'
Reference: Rocks & Min.: 21:274-275.
'Asbestos var: Mountain Leather'
Reference: Rocks & Min.: 21:274-275.
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Aurichalcite
Formula: (Zn,Cu)5(CO3)2(OH)6
Autunite
Formula: Ca(UO2)2(PO4)2 · 11H2O
Awaruite
Formula: Ni3Fe
Reference: Mineralogical Record Vol 12 #3 May/June 1981 pp149-156
'Azovskite'
Formula: Fe3+3(PO4)(OH)6 or near
Reference: Bernstein, Lawrence (1976) Minerals of Washington D.C. and vicinity: U.S. Geological Survey: Open File Report 76-849, 183 p.
Azurite
Formula: Cu3(CO3)2(OH)2
Localities: Reported from at least 12 localities in this region.
Baryte
Formula: BaSO4
Localities: Reported from at least 11 localities in this region.
Beidellite
Formula: (Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Reference: Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p.
Bertrandite
Formula: Be4(Si2O7)(OH)2
Reference: Ref.: Minerals in the Washington D.C. Area.
Beryl
Formula: Be3Al2(Si6O18)
Localities: Reported from at least 9 localities in this region.
Beryl var: Aquamarine
Formula: Be3Al2Si6O18
Reference: MacFall, 1951. Gem Hunter's Guide, 1st ed.
Beryl var: Heliodor
Formula: Be3Al2(Si6O18)
Reference: MacFall, 1951. Gem Hunter's Guide, 1st ed.
'Biotite'
Localities: Reported from at least 22 localities in this region.
Birnessite
Formula: (Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Reference: http://www.irocks.com/chesapeake-biominerals-hazen-article/
Bornite
Formula: Cu5FeS4
Localities: Reported from at least 18 localities in this region.
Brochantite
Formula: Cu4(SO4)(OH)6
Brucite
Formula: Mg(OH)2
Localities: Reported from at least 6 localities in this region.
Cacoxenite
Formula: Fe3+24AlO6(PO4)17(OH)12 · 75H2O
'Calamine'
Reference: Gems and Minerals of America -Jay Ellis Ransom-1974
Calcite
Formula: CaCO3
Localities: Reported from at least 52 localities in this region.
Calcite var: Iceland Spar
Formula: CaCO3
Reference: Minerals of Maryland (1940) Ostrander & Price, JR.
Calcite var: Manganoan Calcite
Formula: (Ca,Mn)CO3
Localities: Reported from at least 6 localities in this region.
Carrollite (TL)
Formula: Cu(Co,Ni)2S4
Localities: Reported from at least 6 localities in this region.
Reference: Faber (1852); Dana 7:I:264; Mineralogical Magazine:43:733 (1980).
Celestine
Formula: SrSO4
Reference: G. Scott Braley Collection
Cerussite
Formula: PbCO3
'Chabazite'
Chabazite-Ca
Formula: (Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Reference: Jeff Weisman
Chabazite-Ca var: Haydenite (FRL)
Formula: (Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Type Locality:
Reference: Paker Cleaveland (1822)
Chalcanthite
Formula: CuSO4 · 5H2O
Localities: Reported from at least 6 localities in this region.
Chalcocite
Formula: Cu2S
Localities: Reported from at least 15 localities in this region.
Chalcopyrite
Formula: CuFeS2
Localities: Reported from at least 31 localities in this region.
'Chlorite Group'
Localities: Reported from at least 43 localities in this region.
Chromite
Formula: Fe2+Cr3+2O4
Localities: Reported from at least 39 localities in this region.
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Localities: Reported from at least 7 localities in this region.
Chrysotile
Formula: Mg3(Si2O5)(OH)4
Localities: Reported from at least 7 localities in this region.
'Clays'
Localities: Reported from at least 13 localities in this region.
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Localities: Reported from at least 14 localities in this region.
Clinochlore var: Chromian Clinochlore
Formula: Mg5(Al,Cr)2Si3O10(OH)8
Localities: Reported from at least 10 localities in this region.
Clinochlore var: Ripidolite
Formula: (Mg,Fe,Al)6(Si,Al)4O10(OH)8
Reference: Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p.
Clinoenstatite
Formula: MgSiO3
Reference: Noonan, A. F., Jarosewich, E., & Clarke, R. S., Jr. (1977) The St. Mary's County, Maryland, Chondrite: Smithsonian Contributions to Earth Science 19,96-103.
'Clinopyroxene Subgroup'
Reference: Noonan, A. F., Jarosewich, E., & Clarke, R. S., Jr. (1977) The St. Mary's County, Maryland, Chondrite: Smithsonian Contributions to Earth Science 19,96-103.
Clinozoisite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Coalingite
Formula: Mg10Fe3+2(OH)24[CO3] · 2H2O
Reference: minerals of washington d.c. area; L.R. Bernstein
'Columbite-(Fe)-Columbite-(Mn) Series'
Reference: Mines of the Washington D.C Area
Copiapite
Formula: Fe2+Fe3+4(SO4)6(OH)2 · 20H2O
Reference: http://www.irocks.com/chesapeake-biominerals-hazen-article/
Copper
Formula: Cu
Corundum
Formula: Al2O3
Reference: Roswell Miller III (1945) The heavy minerals of Florida beach and dune sands. American Mineralogist, 30, 65-75.
Covellite
Formula: CuS
Localities: Reported from at least 8 localities in this region.
Cummingtonite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Reference: Rocks & Min.: 21:144-145; Ostrander & Price (1940), Minerals of Maryland: 27.
Cuprite
Formula: Cu2O
Cuprite var: Chalcotrichite
Formula: Cu2O
Reference: Van King
Desautelsite
Formula: Mg6Mn3+2(OH)16[CO3] · 4H2O
Reference: Min Rec 36:4 pp 435-446
'Deweylite'
Formula: Mg4Si3O10 · 6H2O ?
Localities: Reported from at least 9 localities in this region.
Dickite
Formula: Al2(Si2O5)(OH)4
Reference: Lininger, Jay (1994) The minerals of Frostburg: Matrix: 3: 108-111.
Diopside
Formula: CaMgSi2O6
Diopside var: Chromian Diopside
Formula: Ca(Mg,Cr)Si2O6
Reference: F. Parker (2005) "The Minerals of the Hunting Hill Quarry, Rockville, Maryland" Mineralogical Record 35:435-446.
Dolomite
Formula: CaMg(CO3)2
Localities: Reported from at least 20 localities in this region.
Dravite
Formula: Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
Localities: Reported from at least 6 localities in this region.
Dravite var: Chromian Dravite
Formula: Na((Mg,Cr)3)(Al,Cr)6(Si6O18)(BO3)3(OH)3(OH)
Reference: Mineralogical Record Vol 12 #3 May/June 1981 pp149-156
'Electrum'
Formula: (Au, Ag)
Reference: Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p.
Enstatite
Formula: MgSiO3
Enstatite var: Bronzite
Formula: (Mg,Fe2+)2[SiO3]2
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Localities: Reported from at least 28 localities in this region.
'Fairbanksite'
Reference: F. Morgan (1965) Rocks & Minerals 40:586
'Fayalite-Forsterite Series'
'Feldspar Group'
Felsőbányaite
Formula: Al4(SO4)(OH)10 · 4H2O
Reference: MinRec 1:127
Ferro-hornblende
Formula: ☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
Fluorapatite
Formula: Ca5(PO4)3F
Fluorite
Formula: CaF2
Forsterite
Formula: Mg2SiO4
Gahnite
Formula: ZnAl2O4
Localities: Reported from at least 6 localities in this region.
Galena
Formula: PbS
Localities: Reported from at least 16 localities in this region.
'Garnet Group'
Formula: X3Z2(SiO4)3
Localities: Reported from at least 26 localities in this region.
'Garnierite'
'Glass'
Reference: Noonan, A. F., Jarosewich, E., & Clarke, R. S., Jr. (1973) The St. Mary's County, Maryland, LL3 chondrite. Meteoritics 8:61 - 62.; Grossman, J. N. & Brearley, A. J. (2003). Cryptic metamorphic effects in chondrules from highly unequilibrated ordinary chondrites: An insidious parent-body process. Lunar and Planetary Science Conference XXXIV, pdf#1584.
'Glauconite'
Formula: (K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
Goethite
Formula: α-Fe3+O(OH)
Localities: Reported from at least 19 localities in this region.
Gold
Formula: Au
Localities: Reported from at least 20 localities in this region.
Graphite
Formula: C
Grossular
Formula: Ca3Al2(SiO4)3
Reference: [www.johnbetts-fineminerals.com]
'Grossular-Hibschite Series'
Reference: minerals of washington d.c. area; L.R. Bernstein
Gypsum
Formula: CaSO4 · 2H2O
Localities: Reported from at least 10 localities in this region.
Gypsum var: Selenite
Formula: CaSO4 · 2H2O
Reference: Rocks & Min.: 21:144-145; Ostrander & Price (1940), Minerals of Maryland: 27.
'Halloysite'
Formula: Al2(Si2O5)(OH)4
Reference: Maryland Geologic Survey, Vol. VIII (1898): 164
Harmotome
Formula: (Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] · 12H2O
Description: Occurs in gneiss.
Reference: Dana 6:1070; Rocks & Min.:10:110; Maryland Geologic Survey, Vol. VIII (1898): 164.
Heazlewoodite
Formula: Ni3S2
Reference: Mineralogical Record Vol 12 #3 May/June 1981 pp149-156
Hematite
Formula: Fe2O3
Localities: Reported from at least 32 localities in this region.
Hematite var: Specularite
Formula: Fe2O3
Hemimorphite
Formula: Zn4Si2O7(OH)2 · H2O
Heulandite-Ca
Formula: (Ca,Na)5(Si27Al9)O72 · 26H2O
Reference: M. Levy (1839)
Heulandite-Ca var: Beaumontite (of Lévy) (FRL)
Formula: (Ca,Na)5(Si27Al9)O72 · 26H2O
Type Locality:
Reference: M. Levy (1839)
'Heulandite subgroup'
Hollandite
Formula: Ba(Mn4+6Mn3+2)O16
Reference: http://www.irocks.com/chesapeake-biominerals-hazen-article/
'Hornblende'
Localities: Reported from at least 13 localities in this region.
Huntite
Formula: CaMg3(CO3)4
Reference: minerals of washington d.c. area; L.R. Bernstein
Hydromagnesite
Formula: Mg5(CO3)4(OH)2 · 4H2O
Hydrozincite
Formula: Zn5(CO3)2(OH)6
Idaite
Formula: Cu5FeS6
Reference: Mines of the Washington D.C Area
Ilmenite
Formula: Fe2+TiO3
Localities: Reported from at least 12 localities in this region.
Iron
Formula: Fe
Reference: Noonan, A. F., Jarosewich, E., & Clarke, R. S., Jr. (1973) The St. Mary's County, Maryland, LL3 chondrite. Meteoritics 8:61 - 62.; Noonan, A. F., Jarosewich, E., & Clarke, R. S., Jr. (1977) The St. Mary's County, Maryland, Chondrite: Smithsonian Contributions to Earth Science 19,96-103.
Iron var: Kamacite
Formula: (Fe,Ni)
Reference: Noonan, A. F., Jarosewich, E., & Clarke, R. S., Jr. (1973) The St. Mary's County, Maryland, LL3 chondrite. Meteoritics 8:61 - 62.; Noonan, A. F., Jarosewich, E., & Clarke, R. S., Jr. (1977) The St. Mary's County, Maryland, Chondrite: Smithsonian Contributions to Earth Science 19,96-103.
Jarosite
Formula: KFe3+ 3(SO4)2(OH)6
Reference: Bernstein, Lawrence (1980) Minerals of the Washington D. C. area: Maryland Geological Survey Educational Series 5, 148 p.
Kaolinite
Formula: Al2(Si2O5)(OH)4
'K Feldspar'
Localities: Reported from at least 11 localities in this region.
'K Feldspar var: Adularia'
Formula: KAlSi3O8
Reference: No reference listed
Kyanite
Formula: Al2(SiO4)O
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Localities: Reported from at least 9 localities in this region.
Laurite ?
Formula: RuS2
Reference: Robert C. Smith, II, Ph.D, P.G.
'Limonite'
Formula: (Fe,O,OH,H2O)
Localities: Reported from at least 100 localities in this region.
Linnaeite
Formula: Co2+Co3+2S4
Lipscombite
Formula: Fe2+Fe3+2(PO4)2(OH)2
Reference: Bernstein, Lawrence (1976) Minerals of Washington D.C. and vicinity: U.S. Geological Survey: Open File Report 76-849, 183 p.
Lizardite
Formula: Mg3(Si2O5)(OH)4
Mackinawite
Formula: (Fe,Ni)9S8
Description: with pyrrhotite
Reference: Mines of the Washington D.C Area; Bernstein, Lawrence (1980) Minerals of the Washington D. C. area: Maryland Geological Survey Educational Series 5, 148 p.
Magnesiochromite
Formula: MgCr2O4
Magnesio-hornblende
Formula: ☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
Reference: Jonathan Harris Collection; ;
Magnesite
Formula: MgCO3
Localities: Reported from at least 20 localities in this region.
Magnesite var: Breunnerite
Formula: (Mg,Fe)CO3
Magnetite
Formula: Fe2+Fe3+2O4
Localities: Reported from at least 44 localities in this region.
Malachite
Formula: Cu2(CO3)(OH)2
Localities: Reported from at least 23 localities in this region.
'Manganese Oxides'
Reference: F. Parker (2005) "The Minerals of the Hunting Hill Quarry, Rockville, Maryland" Mineralogical Record 35:435-446.
'Manganese Oxides var: Manganese Dendrites'
Reference: F. Parker (2005) "The Minerals of the Hunting Hill Quarry, Rockville, Maryland" Mineralogical Record 35:435-446.
Marcasite
Formula: FeS2
Localities: Reported from at least 11 localities in this region.
Margarite
Formula: CaAl2(Al2Si2O10)(OH)2
Maucherite
Formula: Ni11As8
Reference: Mineralogical Record Vol 12 #3 May/June 1981 pp149-156
Mcguinnessite
Formula: (Mg,Cu)2(CO3)(OH)2
Reference: Min Rec 36:4 pp 435-446
Melanterite
Formula: Fe2+(H2O)6SO4 · H2O
'Mica Group'
Reference: Gems and Minerals of America - Jay Ellis Ransom-1974
Microcline
Formula: K(AlSi3O8)
Localities: Reported from at least 22 localities in this region.
'Microlite Group' ?
Formula: A2-mTa2X6-wZ-n
Reference: Ref.: Minerals in the Washington D.C. Area.
Millerite
Formula: NiS
Molybdenite
Formula: MoS2
Localities: Reported from at least 6 localities in this region.
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Localities: Reported from at least 38 localities in this region.
Muscovite var: Fuchsite
Formula: K(Al,Cr)3Si3O10(OH)2
Muscovite var: Sericite
Formula: KAl2(AlSi3O10)(OH)2
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Nimite
Formula: (Ni,Mg,Al)6((Si,Al)4O10)(OH)8
Reference: Min Rec 36:4 pp 435-446
Nontronite
Formula: Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Reference: ref.: Minerals of the Washington, D.C. Area.
'Ochre'
Omphacite
Formula: (NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6
Reference: David Schoeberlein Collection
Opal
Formula: SiO2 · nH2O
Localities: Reported from at least 10 localities in this region.
Opal var: Opal-AN
Formula: SiO2 · nH2O
Orthoclase
Formula: K(AlSi3O8)
Ottrélite
Formula: (Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Reference: Dana 6:1071.
Palladium ?
Formula: (Pd,Pt)
Description: Traces reported by David Marcel Larrabee (1969) (No evidence presented that the native element mineral is present.)
Reference: Minerals of Washington D.C. Area; L.R. Bernstein
Pargasite
Formula: {Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Reference: Min Rec 36:4 pp 435-446
Pentlandite
Formula: (FexNiy)Σ9S8
'Petrified Wood'
'Phillipsite'
Reference: Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Localities: Reported from at least 8 localities in this region.
Phosphosiderite
Formula: FePO4 · 2H2O
Reference: Bernstein, Lawrence (1976) Minerals of Washington D.C. and vicinity: U.S. Geological Survey: Open File Report 76-849, 183 p.
Platinum ?
Formula: Pt
Pokrovskite
Formula: Mg2(CO3)(OH)2
Reference: Min Rec 36:4 pp 435-446
Prehnite
Formula: Ca2Al2Si3O10(OH)2
Pseudomalachite
Formula: Cu5(PO4)2(OH)4
Reference: Mines of the Washington D.C Area
'Psilomelane'
Reference: Heyl, A. & Pearre, N (1965) Copper, zinc, lead, iron cobalt and barite deposits of the Piedmont Upland in Maryland: Maryland Geological Survey: Bulletin 28, 72 p.
Pyrite
Formula: FeS2
Localities: Reported from at least 57 localities in this region.
Pyroaurite
Formula: Mg6Fe3+2(OH)16[CO3] · 4H2O
Reference: Mineralogical Record Vol 12 #3 May/June 1981 pp149-156
'Pyrochlore Group' ?
Formula: A2Nb2(O,OH)6Z
Reference: Ref.: Minerals in the Washington D.C. Area.
Pyrolusite
Formula: Mn4+O2
Pyrope
Formula: Mg3Al2(SiO4)3
Locality: Frost Quarry, Davis, Howard Co., Maryland, USA - erroneously reported
Description: Pyrope is not found in granite pegmatites of low pressure regimes. This species is restricted to ultrabasic rocks and high pressure metamorphic environments.
Reference: reported by Ostrander and Price(1940) but not seen in in dumps by Bernstein (1980)
Pyrophyllite
Formula: Al2Si4O10(OH)2
'Pyroxene Group'
Reference: Noonan, A. F., Jarosewich, E., & Clarke, R. S., Jr. (1973) The St. Mary's County, Maryland, LL3 chondrite. Meteoritics 8:61 - 62.
Pyrrhotite
Formula: Fe7S8
Localities: Reported from at least 9 localities in this region.
Quartz
Formula: SiO2
Localities: Reported from at least 107 localities in this region.
Quartz var: Amethyst
Formula: SiO2
Quartz var: Blue Quartz
Formula: SiO2
Reference: Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p.
Quartz var: Chalcedony
Formula: SiO2
Localities: Reported from at least 18 localities in this region.
Quartz var: Jasper
Quartz var: Milky Quartz
Formula: SiO2
Quartz var: Moss Agate
Formula: SiO2
Localities: Reported from at least 7 localities in this region.
Quartz var: Rock Crystal
Formula: SiO2
Quartz var: Rutilated Quartz
Formula: SiO2
Reference: Minerals of the Washington, D.C. Area
Quartz var: Smoky Quartz
Formula: SiO2
'Remingtonite' (FRL)
Type Locality:
Reference: Palache, Charles, Harry Berman & Clifford Frondel (1951), Dana's System of Mineralogy, Volume 2: 176.
Riebeckite
Formula: ◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
Reference: Mines of the Washington D.C Area
Rockbridgeite
Formula: Fe2+Fe3+4(PO4)3(OH)5
Description: Occurs in limonite concretions.
Reference: Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 868.
Romanèchite
Formula: (Ba,H2O)2(Mn4+,Mn3+)5O10
Reference: http://www.irocks.com/chesapeake-biominerals-hazen-article/
Rosasite
Formula: (Cu,Zn)2(CO3)(OH)2
Reference: Mines of the Washington D.C Area
Rutile
Formula: TiO2
Localities: Reported from at least 14 localities in this region.
'Scapolite'
'Scapolite var: Wernerite'
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Localities: Reported from at least 29 localities in this region.
Scolecite
Formula: CaAl2Si3O10 · 3H2O
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Localities: Reported from at least 33 localities in this region.
'Serpentine Subgroup var: Marmolite'
Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Reference: Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland, 27p.
'Serpentine Subgroup var: Picrolite'
Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Localities: Reported from at least 6 localities in this region.
Siderite
Formula: FeCO3
Localities: Reported from at least 22 localities in this region.
Siderite var: Sphärosiderite
Formula: FeCO3
Reference: Ostrander, C. W. & W. E. Price (1940) Minerals of Maryland: Natural History Society of Maryland , 92 p.
Siegenite
Formula: CoNi2S4
Sillimanite
Formula: Al2(SiO4)O
Reference: http://www.benitoitemine.com/benitoite/klean.shtml
Silver
Formula: Ag
Smithsonite
Formula: ZnCO3
Spessartine
Formula: Mn2+3Al2(SiO4)3
Sphalerite
Formula: ZnS
Localities: Reported from at least 14 localities in this region.
Spinel
Formula: MgAl2O4
Staurolite
Formula: Fe2+2Al9Si4O23(OH)
Localities: Reported from at least 7 localities in this region.
Stibnite
Formula: Sb2S3
'Stilbite subgroup'
Localities: Reported from at least 9 localities in this region.
Strontianite
Formula: SrCO3
Sulphur
Formula: S8
Reference: Dana 6:910,1030,1071; Rocks & Min.: 22:1023.
Taenite
Formula: (Fe,Ni)
Reference: Noonan, A. F., Jarosewich, E., & Clarke, R. S., Jr. (1977) The St. Mary's County, Maryland, Chondrite: Smithsonian Contributions to Earth Science 19,96-103.
Talc
Formula: Mg3Si4O10(OH)2
Localities: Reported from at least 43 localities in this region.
'Tantalite'
Formula: (Mn,Fe)(Ta,Nb)2O6
Reference: Mines of the Washington D.C Area
Tenorite
Formula: CuO
Tetradymite
Formula: Bi2Te2S
Tetrahedrite
Formula: Cu6[Cu4(Fe,Zn)2]Sb4S13
Reference: Rocks & Min.: 21:665.
Titanite
Formula: CaTi(SiO4)O
Localities: Reported from at least 12 localities in this region.
Tochilinite
Formula: Fe2+5-6(Mg,Fe2+)5S6(OH)10
Reference: Min Rec 36:4 pp 435-446
Todorokite
Formula: (Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
Reference: Cordua, Bill (1969) Mineralogy of a newly exposed granite near White Oaks, MD: Rocks and Minerals: 44 (2): 114-115.
'Tourmaline'
Formula: A(D3)G6(T6O18)(BO3)3X3Z
Localities: Reported from at least 6 localities in this region.
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Localities: Reported from at least 17 localities in this region.
Troilite
Formula: FeS
Reference: Noonan, A. F., Jarosewich, E., & Clarke, R. S., Jr. (1973) The St. Mary's County, Maryland, LL3 chondrite. Meteoritics 8:61 - 62.; Noonan, A. F., Jarosewich, E., & Clarke, R. S., Jr. (1977) The St. Mary's County, Maryland, Chondrite: Smithsonian Contributions to Earth Science 19,96-103.; Grady, M.M. (2000). Catalogue of Meteorites (5/e). Cambridge University Press: Cambridge; New York; Oakleigh; Madrid; Cape Town. 689 pages.
Uraninite
Formula: UO2
Reference: Cordua, Bill (1969) Mineralogy of a newly exposed granite near White Oaks, MD: Rocks and Minerals: 44 (2): 114-115.
'Uvite Series'
Formula: Ca(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)
Vermiculite
Formula: Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Localities: Reported from at least 6 localities in this region.
Vesuvianite
Formula: (Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Violarite
Formula: Fe2+Ni3+2S4
Vivianite
Formula: Fe2+3(PO4)2 · 8H2O
'Wad'
Localities: Reported from at least 6 localities in this region.
Wollastonite
Formula: CaSiO3
Wulfenite
Formula: Pb(MoO4)
Xonotlite
Formula: Ca6(Si6O17)(OH)2
Reference: [MinRec 30:467]
Zaratite
Formula: Ni3(CO3)(OH)4 · 4H2O ?
'Zinnwaldite' ?
Reference: Ref.: Minerals in the Washington D.C. Area.
Zircon
Formula: Zr(SiO4)
Localities: Reported from at least 9 localities in this region.
Zoisite
Formula: Ca2Al3[Si2O7][SiO4]O(OH)
Localities: Reported from at least 9 localities in this region.
Zoisite var: Thulite
Formula: {Ca2}{Al,Mn3+3}(Si2O7)(SiO4)O(OH)

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Awaruite1.AE.20Ni3Fe
Copper1.AA.05Cu
'Electrum'1.AA.05(Au, Ag)
Gold1.AA.05Au
Graphite1.CB.05aC
Iron1.AE.05Fe
var: Kamacite1.AE.05(Fe,Ni)
Palladium ?1.AF.10(Pd,Pt)
Platinum ?1.AF.10Pt
Silver1.AA.05Ag
Sulphur1.CC.05S8
Taenite1.AE.10(Fe,Ni)
Group 2 - Sulphides and Sulfosalts
Arsenopyrite2.EB.20FeAsS
Bornite2.BA.15Cu5FeS4
Carrollite (TL)2.DA.05Cu(Co,Ni)2S4
Chalcocite2.BA.05Cu2S
Chalcopyrite2.CB.10aCuFeS2
Covellite2.CA.05aCuS
Galena2.CD.10PbS
Heazlewoodite2.BB.05Ni3S2
Idaite2.CB.15aCu5FeS6
Laurite ?2.EB.05aRuS2
Linnaeite2.DA.05Co2+Co3+2S4
Mackinawite2.CC.25(Fe,Ni)9S8
Marcasite2.EB.10aFeS2
Maucherite2.AB.15Ni11As8
Millerite2.CC.20NiS
Molybdenite2.EA.30MoS2
Pentlandite2.BB.15(FexNiy)Σ9S8
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Siegenite2.DA.05CoNi2S4
Sphalerite2.CB.05aZnS
Stibnite2.DB.05Sb2S3
Tetradymite2.DC.05Bi2Te2S
Tetrahedrite2.GB.05Cu6[Cu4(Fe,Zn)2]Sb4S13
Tochilinite2.FD.35Fe2+5-6(Mg,Fe2+)5S6(OH)10
Troilite2.CC.10FeS
Violarite2.DA.05Fe2+Ni3+2S4
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Birnessite4.FL.45(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
Brucite4.FE.05Mg(OH)2
Chromite4.BB.05Fe2+Cr3+2O4
Corundum4.CB.05Al2O3
Cuprite4.AA.10Cu2O
var: Chalcotrichite4.AA.10Cu2O
Gahnite4.BB.05ZnAl2O4
Goethite4.00.α-Fe3+O(OH)
Hematite4.CB.05Fe2O3
var: Specularite4.CB.05Fe2O3
Hollandite4.DK.05aBa(Mn4+6Mn3+2)O16
Ilmenite4.CB.05Fe2+TiO3
Magnesiochromite4.BB.05MgCr2O4
Magnetite4.BB.05Fe2+Fe3+2O4
'Microlite Group' ?4.00.A2-mTa2X6-wZ-n
Opal4.DA.10SiO2 · nH2O
var: Opal-AN4.DA.10SiO2 · nH2O
'Pyrochlore Group' ?4.00.A2Nb2(O,OH)6Z
Pyrolusite4.DB.05Mn4+O2
Quartz4.DA.05SiO2
var: Amethyst4.DA.05SiO2
var: Blue Quartz4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
var: Jasper4.DA.05SiO2
var: Milky Quartz4.DA.05SiO2
var: Moss Agate4.DA.05SiO2
var: Rock Crystal4.DA.05SiO2
var: Rutilated Quartz4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Romanèchite4.DK.10(Ba,H2O)2(Mn4+,Mn3+)5O10
Rutile4.DB.05TiO2
Spinel4.BB.05MgAl2O4
Tenorite4.AB.10CuO
Todorokite4.DK.10(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
Uraninite4.DL.05UO2
Group 5 - Nitrates and Carbonates
Ankerite5.AB.10Ca(Fe2+,Mg)(CO3)2
Aragonite5.AB.15CaCO3
Aurichalcite5.BA.15(Zn,Cu)5(CO3)2(OH)6
Azurite5.BA.05Cu3(CO3)2(OH)2
Calcite5.AB.05CaCO3
var: Iceland Spar5.AB.05CaCO3
var: Manganoan Calcite5.AB.05(Ca,Mn)CO3
Cerussite5.AB.15PbCO3
Coalingite5.DA.55Mg10Fe3+2(OH)24[CO3] · 2H2O
Desautelsite5.DA.50Mg6Mn3+2(OH)16[CO3] · 4H2O
Dolomite5.AB.10CaMg(CO3)2
Huntite5.AB.25CaMg3(CO3)4
Hydromagnesite5.DA.05Mg5(CO3)4(OH)2 · 4H2O
Hydrozincite5.BA.15Zn5(CO3)2(OH)6
Magnesite5.AB.05MgCO3
var: Breunnerite5.AB.05(Mg,Fe)CO3
Malachite5.BA.10Cu2(CO3)(OH)2
Mcguinnessite5.BA.10(Mg,Cu)2(CO3)(OH)2
Pokrovskite5.BA.10Mg2(CO3)(OH)2
Pyroaurite5.DA.50Mg6Fe3+2(OH)16[CO3] · 4H2O
Rosasite5.BA.10(Cu,Zn)2(CO3)(OH)2
Siderite5.AB.05FeCO3
var: Sphärosiderite5.AB.05FeCO3
Smithsonite5.AB.05ZnCO3
Strontianite5.AB.15SrCO3
Zaratite5.DA.15Ni3(CO3)(OH)4 · 4H2O ?
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Anglesite7.AD.35PbSO4
Anhydrite7.AD.30CaSO4
Baryte7.AD.35BaSO4
Brochantite7.BB.25Cu4(SO4)(OH)6
Celestine7.AD.35SrSO4
Chalcanthite7.CB.20CuSO4 · 5H2O
Copiapite7.DB.35Fe2+Fe3+4(SO4)6(OH)2 · 20H2O
Felsőbányaite7.DD.05Al4(SO4)(OH)10 · 4H2O
Gypsum7.CD.40CaSO4 · 2H2O
var: Selenite7.CD.40CaSO4 · 2H2O
Jarosite7.BC.10KFe3+ 3(SO4)2(OH)6
Melanterite7.CB.35Fe2+(H2O)6SO4 · H2O
Wulfenite7.GA.05Pb(MoO4)
Group 8 - Phosphates, Arsenates and Vanadates
Autunite8.EB.05Ca(UO2)2(PO4)2 · 11H2O
Cacoxenite8.DC.40Fe3+24AlO6(PO4)17(OH)12 · 75H2O
Fluorapatite8.BN.05Ca5(PO4)3F
Lipscombite8.BB.90Fe2+Fe3+2(PO4)2(OH)2
Phosphosiderite8.CD.05FePO4 · 2H2O
Pseudomalachite8.BD.05Cu5(PO4)2(OH)4
Rockbridgeite8.BC.10Fe2+Fe3+4(PO4)3(OH)5
Torbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
Vivianite8.CE.40Fe2+3(PO4)2 · 8H2O
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Albite9.FA.35Na(AlSi3O8)
var: Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
Almandine9.AD.25Fe2+3Al2(SiO4)3
Analcime9.GB.05Na(AlSi2O6) · H2O
Anthophyllite9.DD.05☐{Mg2}{Mg5}(Si8O22)(OH)2
Antigorite9.ED.15Mg3(Si2O5)(OH)4
var: Williamsite9.ED.15Mg3(Si2O5)(OH)4
Arfvedsonite9.DE.25[Na][Na2][Fe2+4Fe3+]Si8O22(OH)2
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Beidellite9.EC.40(Na,Ca0.5)0.3Al2((Si,Al)4O10)(OH)2 · nH2O
Bertrandite9.BD.05Be4(Si2O7)(OH)2
Beryl9.CJ.05Be3Al2(Si6O18)
var: Aquamarine9.CJ.05Be3Al2Si6O18
var: Heliodor9.CJ.05Be3Al2(Si6O18)
Chabazite-Ca9.GD.10(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
var: Haydenite (TL)9.GD.10(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Chrysocolla9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Chrysotile9.ED.15Mg3(Si2O5)(OH)4
Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
var: Chromian Clinochlore9.EC.55Mg5(Al,Cr)2Si3O10(OH)8
var: Ripidolite9.EC.55(Mg,Fe,Al)6(Si,Al)4O10(OH)8
Clinoenstatite9.DA.10MgSiO3
Clinozoisite9.BG.05a{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Cummingtonite9.DE.05☐{Mg2}{Mg5}(Si8O22)(OH)2
Dickite9.ED.05Al2(Si2O5)(OH)4
Diopside9.DA.15CaMgSi2O6
var: Chromian Diopside9.DA.15Ca(Mg,Cr)Si2O6
Dravite9.CK.05Na(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)
var: Chromian Dravite9.CK.05Na((Mg,Cr)3)(Al,Cr)6(Si6O18)(BO3)3(OH)3(OH)
Enstatite9.DA.05MgSiO3
var: Bronzite9.DA.05(Mg,Fe2+)2[SiO3]2
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ferro-hornblende9.DE.10☐{Ca2}{Fe2+4Al}(AlSi7O22)(OH)2
Forsterite9.AC.05Mg2SiO4
Grossular9.AD.25Ca3Al2(SiO4)3
'Halloysite'9.ED.10Al2(Si2O5)(OH)4
Harmotome9.GC.10(Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] · 12H2O
Hemimorphite9.BD.10Zn4Si2O7(OH)2 · H2O
Heulandite-Ca9.GE.05(Ca,Na)5(Si27Al9)O72 · 26H2O
var: Beaumontite (of Lévy) (TL)9.GE.05(Ca,Na)5(Si27Al9)O72 · 26H2O
Kaolinite9.ED.05Al2(Si2O5)(OH)4
Kyanite9.AF.15Al2(SiO4)O
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Lizardite9.ED.15Mg3(Si2O5)(OH)4
Magnesio-hornblende9.DE.10☐{Ca2}{Mg4Al}(AlSi7O22)(OH)2
Margarite9.EC.30CaAl2(Al2Si2O10)(OH)2
Microcline9.FA.30K(AlSi3O8)
Muscovite9.EC.15KAl2(AlSi3O10)(OH)2
var: Fuchsite9.EC.15K(Al,Cr)3Si3O10(OH)2
var: Sericite9.EC.15KAl2(AlSi3O10)(OH)2
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Nimite9.EC.55(Ni,Mg,Al)6((Si,Al)4O10)(OH)8
Nontronite9.EC.40Na0.3Fe2((Si,Al)4O10)(OH)2 · nH2O
Omphacite9.DA.20(NaaCabFe2+cMgd)(AleFe3+fFe2+gMgh)Si2O6
Orthoclase9.FA.30K(AlSi3O8)
Ottrélite9.AF.85(Mn2+,Fe2+,Mg)Al2(SiO4)O(OH)2
Pargasite9.DE.15{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Prehnite9.DP.20Ca2Al2Si3O10(OH)2
Pyrope ?9.AD.25Mg3Al2(SiO4)3
Pyrophyllite9.EC.10Al2Si4O10(OH)2
Riebeckite9.DE.25◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Scolecite9.GA.05CaAl2Si3O10 · 3H2O
Sillimanite9.AF.05Al2(SiO4)O
Spessartine9.AD.25Mn2+3Al2(SiO4)3
Staurolite9.AF.30Fe2+2Al9Si4O23(OH)
Talc9.EC.05Mg3Si4O10(OH)2
Titanite9.AG.15CaTi(SiO4)O
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
'Uvite Series' ?9..Ca(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)
Vermiculite9.EC.50Mg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
Vesuvianite9.BG.35(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Wollastonite9.DG.05CaSiO3
Xonotlite9.DG.35Ca6(Si6O17)(OH)2
Zircon9.AD.30Zr(SiO4)
Zoisite9.BG.10Ca2Al3[Si2O7][SiO4]O(OH)
var: Thulite9.BG.10{Ca2}{Al,Mn3+3}(Si2O7)(SiO4)O(OH)
Unclassified Minerals, Rocks, etc.
''-
'Albite-Anorthite Series'-
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Almandine-Spessartine Series'-
'Alum Group'-XAl(SO4)2 · 12H2O
'Amber'-
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'var: Byssolite'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Apatite'-
'Apophyllite'-
'Asbestos'-
'var: Mountain Leather'-
'Azovskite'-Fe3+3(PO4)(OH)6 or near
'Biotite'-
'Calamine'-
'Chabazite'-
'Chlorite Group'-
'Clays'-
'Clinopyroxene Subgroup'-
'Columbite-(Fe)-Columbite-(Mn) Series'-
'Deweylite'-Mg4Si3O10 · 6H2O ?
'Fairbanksite'-
'Fayalite-Forsterite Series'-
'Feldspar Group'-
'Garnet Group'-X3Z2(SiO4)3
'Garnierite'-
'Glass'-
'Glauconite'-(K,Na)(Fe3+,Al,Mg)2(Si,Al)4O10(OH)2
'Grossular-Hibschite Series'-
'Heulandite subgroup'-
'Hornblende'-
'K Feldspar'-
'var: Adularia'-KAlSi3O8
'Limonite'-(Fe,O,OH,H2O)
'Manganese Oxides'-
'var: Manganese Dendrites'-
'Mica Group'-
'Ochre'-
'Petrified Wood'-
'Phillipsite'-
'Psilomelane'-
'Pyroxene Group'-
'Remingtonite' (TL)-
'Scapolite'-
'var: Wernerite'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
'var: Marmolite'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
'var: Picrolite'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
'Stilbite subgroup'-
'Tantalite'-(Mn,Fe)(Ta,Nb)2O6
'Tourmaline'-A(D3)G6(T6O18)(BO3)3X3Z
'Wad'-
'Zinnwaldite' ?-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Awaruite1.1.11.4Ni3Fe
Copper1.1.1.3Cu
Gold1.1.1.1Au
Iron
var: Kamacite
1.1.11.1(Fe,Ni)
Silver1.1.1.2Ag
Taenite1.1.11.2(Fe,Ni)
Platinum Group Metals and Alloys
Palladium ?1.2.1.4(Pd,Pt)
Platinum ?1.2.1.1Pt
Semi-metals and non-metals
Graphite1.3.6.2C
Sulphur1.3.5.1S8
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 2:1
Chalcocite2.4.7.1Cu2S
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
Heazlewoodite2.5.3.1Ni3S2
AmBnXp, with (m+n):p = 9:8
Mackinawite2.7.2.1(Fe,Ni)9S8
Pentlandite2.7.1.1(FexNiy)Σ9S8
AmXp, with m:p = 1:1
Covellite2.8.12.1CuS
Galena2.8.1.1PbS
Millerite2.8.16.1NiS
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
Troilite2.8.9.1FeS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
Idaite2.9.14.1Cu5FeS6
AmBnXp, with (m+n):p = 3:4
Carrollite (TL)2.10.1.2Cu(Co,Ni)2S4
Linnaeite2.10.1.1Co2+Co3+2S4
Siegenite2.10.1.6CoNi2S4
Violarite2.10.1.8Fe2+Ni3+2S4
AmBnXp, with (m+n):p = 2:3
Stibnite2.11.2.1Sb2S3
Tetradymite2.11.7.1Bi2Te2S
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Laurite ?2.12.1.10RuS2
Marcasite2.12.2.1FeS2
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Hydroxysulfides and Hydrated Sulfides
Tochilinite2.14.2.1Fe2+5-6(Mg,Fe2+)5S6(OH)10
Miscellaneous
Maucherite2.16.16.1Ni11As8
Group 3 - SULFOSALTS
3 <ø < 4
Tetrahedrite3.3.6.1Cu6[Cu4(Fe,Zn)2]Sb4S13
Group 4 - SIMPLE OXIDES
A2X
Cuprite4.1.1.1Cu2O
AX
Tenorite4.2.3.1CuO
A2X3
Corundum4.3.1.1Al2O3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
AX2
Pyrolusite4.4.1.4Mn4+O2
Rutile4.4.1.1TiO2
Group 5 - OXIDES CONTAINING URANIUM OR THORIUM
AXO2·xH2O
Uraninite5.1.1.1UO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
X(OH)2
Brucite6.2.1.1Mg(OH)2
Group 7 - MULTIPLE OXIDES
AB2X4
Chromite7.2.3.3Fe2+Cr3+2O4
Gahnite7.2.1.4ZnAl2O4
Magnesiochromite7.2.3.1MgCr2O4
Magnetite7.2.2.3Fe2+Fe3+2O4
Spinel7.2.1.1MgAl2O4
(AB)2X3
Birnessite7.5.3.1(Na,Ca)0.5(Mn4+,Mn3+)2O4 · 1.5H2O
AB3X7
Todorokite7.8.1.1(Na,Ca,K,Ba,Sr)1-x(Mn,Mg,Al)6O12 · 3-4H2O
AB8X16
Hollandite7.9.1.1Ba(Mn4+6Mn3+2)O16
Romanèchite7.9.2.1(Ba,H2O)2(Mn4+,Mn3+)5O10
Group 8 - MULTIPLE OXIDES CONTAINING NIOBIUM,TANTALUM OR TITANIUM
A2B2O6(O,OH,F)
'Microlite Group' ?8.2.2.1A2-mTa2X6-wZ-n
'Pyrochlore Group' ?8.2.1.1A2Nb2(O,OH)6Z
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Cerussite14.1.3.4PbCO3
Magnesite14.1.1.2MgCO3
Siderite14.1.1.3FeCO3
Smithsonite14.1.1.6ZnCO3
Strontianite14.1.3.3SrCO3
AB(XO3)2
Ankerite14.2.1.2Ca(Fe2+,Mg)(CO3)2
Dolomite14.2.1.1CaMg(CO3)2
Miscellaneous
Huntite14.4.3.1CaMg3(CO3)4
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Azurite16a.2.1.1Cu3(CO3)2(OH)2
Malachite16a.3.1.1Cu2(CO3)(OH)2
Mcguinnessite16a.3.1.4(Mg,Cu)2(CO3)(OH)2
Pokrovskite16a.3.1.5Mg2(CO3)(OH)2
Rosasite16a.3.1.2(Cu,Zn)2(CO3)(OH)2
Aurichalcite16a.4.2.1(Zn,Cu)5(CO3)2(OH)6
Hydrozincite16a.4.1.1Zn5(CO3)2(OH)6
Group 16b - HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
Zaratite16b.4.1.1Ni3(CO3)(OH)4 · 4H2O ?
Desautelsite16b.6.2.4Mg6Mn3+2(OH)16[CO3] · 4H2O
Pyroaurite16b.6.2.3Mg6Fe3+2(OH)16[CO3]