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Maryland, USAi
Regional Level Types
MarylandState
USACountry

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Key
Locality type:
Largest Settlements:
PlacePopulation
Baltimore621,849 (2018)
Columbia99,615 (2011)
Germantown86,395 (2011)
Silver Spring71,452 (2011)
Frederick69,479 (2017)
Waldorf67,752 (2011)
Other Languages:
French:
Maryland, États-Unis
German:
Maryland, Vereinigte Staaten
Italian:
Maryland, Stati Uniti d'America
Russian:
Мэриленд, Соединённые Штаты Америки
Simplified Chinese:
马里兰州, 美国
Spanish:
Maryland, Estados Unidos
Afrikaans:
Maryland, Verenigde State van Amerika
Albanian:
Maryland, Shtetet e Bashkuara të Amerikës
Amharic:
ሜሪላንድ, አሜሪካ
Anglo-Saxon:
Marianland, Geānedu Rīcu American
Arabic:
ماريلند, الولايات المتحدة
Aragonese:
Maryland
Armenian:
Մերիլենդ, Ամերիկայի Միացյալ Նահանգներ
Asturian:
Maryland, Estaos Xuníos d'América
Aymara:
Maryland suyu, Istadus Unidus
Azeri:
Merilend, Amerika Birləşmiş Ştatları
Basque:
Maryland
Bavarian:
Maryland, Vaoanigte Stootn
Belarusian:
Мэрыленд, Злучаныя Штаты Амерыкі
Belarusian (Tarashkevitsa):
Мэрылэнд, Злучаныя Штаты Амэрыкі
Bengali:
মেরিল্যান্ড, মার্কিন যুক্তরাষ্ট্র
Bishnupriya Manipuri:
মেরিল্যান্ড, তিলপারাষ্ট্র
Bislama:
Maryland, Yunaeted Stet blong Amerika
Bosnian:
Maryland, Sjedinjene Američke Države
Breton:
Maryland, Stadoù-Unanet Amerika
Bulgarian:
Мериленд, Съединени американски щати
Burmese:
မေရီလန်းပြည်နယ်, အမေရိကန်ပြည်ထောင်စု
Catalan:
Maryland, Estats Units d’Amèrica
Cebuano:
Maryland
Central Bikol:
Maryland, Estados Unidos
Chechen:
Мэриленд, Америкин Цхьаьнатоьхна Штаташ
Cornish:
Tir Maria, Statys Unys
Corsican:
Maryland, Stati Uniti d'America
Croatian:
Maryland, Sjedinjene Američke Države
Czech:
Maryland, Spojené státy americké
Danish:
Maryland, USA
Dutch:
Maryland, Verenigde Staten
Egyptian Arabic:
ماريلاند, امريكا
Emilian-Romagnol:
Maryland, Stat Unî
Esperanto:
Marilando
Estonian:
Maryland, Ameerika Ühendriigid
Faroese:
Maryland
Farsi/Persian:
مریلند, ایالات متحده آمریکا
Fiji Hindi:
Maryland, United States
Finnish:
Maryland, Yhdysvallat
Franco-Provençal:
Maryland, Ètats-Unis
Gagauz:
Maryland, Amerika Birleşik Devletläri
Galician:
Maryland, Estados Unidos de América
Georgian:
მერილენდი, ამერიკის შეერთებული შტატები
Greek:
Μέριλαντ, Ηνωμένες Πολιτείες Αμερικής
Guarani:
Maryland, Tetãvore Joapykuéra
Haitian:
Merilann, Etazini
Hakka:
Maryland
Hausa:
Maryland, Tarayyar Amurka
Hawaiian:
Melelana, ‘Amelika Hui Pū ‘ia
Hebrew:
מרילנד, ארצות הברית
Hill Mari:
Мэриленд, Америкын Ушымы Штатвлӓжӹ
Hindi:
मैरिलैण्ड, संयुक्त राज्य
Hungarian:
Maryland, Amerikai Egyesült Államok
Icelandic:
Maryland, Bandaríkin
Ido:
Maryland, Usa
Igbo:
Mérílạnd, Njikọ̀taọ̀hà
Iloko:
Maryland, Estados Unidos iti Amerika
Indonesian:
Maryland, Amerika Serikat
Interlingua:
Maryland, Statos Unite de America
Irish Gaelic:
Maryland, Stáit Aontaithe Mheiriceá
Japanese:
メリーランド州, アメリカ合衆国
Javanese:
Maryland, Amérika Sarékat
Judaeo-Spanish:
Maryland, Estados Unidos de Amerika
Kabiye:
Marilandɩ, Etaazuunii
Kabyle:
Maryland, Iwunak Yeddukklen n Temrikt
Kalmyk:
Мэрилэнд, Америкин Ниицәтә Орн Нутугуд
Kannada:
ಮೇರಿಲ್ಯಾಂಡ್, ಅಮೇರಿಕ ಸಂಯುಕ್ತ ಸಂಸ್ಥಾನ
Kapampangan:
Maryland, Estados Unidos
Kashmiri:
میرِلَنڈ
Kazakh (Cyrillic Script):
Мэриленд, Америка Құрама Штаттары
Korean:
메릴랜드주, 미국
Kurdish (Latin Script):
Maryland, Dewletên Yekbûyî yên Amerîkayê
Latin:
Terra Mariae, Civitates Foederatae Americae
Latvian:
Mērilenda, Amerikas Savienotās Valstis
Ligurian:
Maryland, Stati Unïi d'America
Limburgian:
Maryland, Vereinegde Staote vaan Amerika
Lithuanian:
Merilandas, Jungtinės Amerikos Valstijos
Lombard:
Maryland, Stat Ünì d'America
Low Saxon/Low German:
Maryland, USA
Luri:
مریلٱند, ڤولاتچٱیا یٱکاگرتٱ آمریکا
Luxembourgish:
Maryland, Vereenegt Staate vun Amerika
Macedonian:
Мериленд, Соединети Американски Држави
Maithili:
मेरिल्याण्ड, संयुक्त राज्य अमेरिका
Malagasy:
Maryland, Etazonia
Malay:
Maryland, Amerika Syarikat
Malayalam:
മെരിലാൻ‌ഡ്
Manx:
Maryland, Steatyn Unnaneysit America
Maori:
Maryland, Hononga-o-Amerika
Marathi:
मेरीलँड, अमेरिकेची संयुक्त संस्थाने
Mazanderani:
مریلند
Meadow Mari:
Мэриленд, Ушымо Американ Штат-влак
Min Dong Chinese:
Maryland
Mingrelian:
მერილენდი, ამერიკაშ აკოართაფილი შტატეფი
Mongolian:
Мэрилэнд, Америкийн Нэгдсэн Улс
Nauruan:
Maryland, Eben Merika
Navajo:
Tóbinídahaazyíní Hahoodzo, Wááshindoon Bikéyah Ałhidadiidzooígíí
Nepali:
मेरिल्यान्ड, संयुक्त राज्य अमेरिका
Newar / Nepal Bhasa:
मेरिल्यान्द, संयुक्त राज्य अमेरिका
Northern Frisian:
Maryland, Feriind Stoote foon Ameerika
Northern Sami:
Maryland, Amerihká ovttastuvvan stáhtat
Norwegian:
Maryland, USA
Norwegian (Nynorsk):
Maryland, USA
Occitan:
Maryland, Estats Units d'America
Ossetian:
Мэриленд, Америкæйы Иугонд Штаттæ
Pali:
मेरील्यान्ड, संयुक्त राज्य अमेरिका
Piedmontese:
Maryland, Stat Unì d'América
Polish:
Maryland, Stany Zjednoczone
Portuguese:
Maryland, Estados Unidos
Punjabi:
ਮੈਰੀਲੈਂਡ, ਸੰਯੁਕਤ ਰਾਜ ਅਮਰੀਕਾ
Quechua:
Maryland suyu, Hukllachasqa Amirika Suyukuna
Romanian:
Maryland, Statele Unite ale Americii
Romansh:
Maryland, Stadis Unids
Russia Buriat:
Мэриленд
Samoan:
Marilani, Iunaite Sitete o Amerika
Samogitian:
Merilands, JAV
Sanskrit:
मेरिलैण्ड, अमेरिकासंयुक्तराज्यम्
Sardinian:
Maryland, Istados Unidos de Amèrica
Saterland Frisian:
Maryland, Fereende Stoaten fon Amerikoa
Scots:
Maryland
Scottish Gaelic:
Maryland, Na Stàitean Aonaichte
Serbian:
Мериленд, Сједињене Америчке Државе
Serbo-Croatian:
Maryland, Sjedinjene Američke Države
Sicilian:
Maryland, Stati Uniti
Silesian:
Maryland, Zjednoczůne Sztaty
Slovak:
Maryland, Spojené štáty
Slovenian:
Maryland, Združene države Amerike
South Azerbaijani:
مریلند ایالتی, آمریکا بیرلشمیش ایالتلری
Swahili:
Maryland, Marekani
Swedish:
Maryland, USA
Tagalog:
Maryland, Estados Unidos
Tamil:
மேரிலாந்து, அமெரிக்க ஐக்கிய நாடு
Tatar:
Мэриленд, Америка Кушма Штатлары
Telugu:
మేరీల్యాండ్, అమెరికా సంయుక్త రాష్ట్రాలు
Thai:
รัฐแมริแลนด์, ประเทศสหรัฐอเมริกา
Tibetan (Standard):
མ་རིས་ལེན་ཌ།, ཨ་མེ་རི་ཁ་རྒྱལ་ཕྲན་མཉམ་འབྲེལ་རྒྱལ་ཁབ།
Traditional Chinese:
馬利蘭州, 美國
Turkish:
Maryland, Amerika Birleşik Devletleri
Ukrainian:
Меріленд, Сполучені Штати Америки
Urdu:
میری لینڈ, ریاستہائے متحدہ امریکا
Uyghur:
Maryland Shitati, ئامېرىكا قوشما شىتاتلىرى
Uzbek (Latin Script):
Maryland, Amerika Qoʻshma Shtatlari
Venetian:
Maryland, Stati Unii de ła Mèrica
Vietnamese:
Maryland, Chủng Quốc Hoa Kỳ
Volapük:
Maryland, Lamerikän
Waray:
Maryland, Estados Unidos
Welsh:
Maryland, Unol Daleithiau America
West Frisian:
Marylân, Feriene Steaten
Western Punjabi:
میری لینڈ, امریکہ
Wu Chinese:
马里兰州, 美国
Xhosa:
IMarilandi, IYunayithedi Steyitsi
Yakut:
Мэрилэнд, Америка Холбоһуктаах Штааттара
Yiddish:
מארילאנד, פאראייניקטע שטאטן פון אמעריקע
Yoruba:
Maryland
Zazaki:
Maryland, Dewletê Amerikayê Yewbiyayey
Zulu:
Maryland, IMelika


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

163 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 20 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'
Formula: Ca5(PO4)3(Cl/F/OH)
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'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Localities: Reported from at least 23 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 47 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 21 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: Mg2Si2O6
Enstatite var: Bronzite
Formula: (Mg,Fe2+)2[SiO3]2
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Localities: Reported from at least 29 localities in this region.
'Fairbanksite'
Reference: F. Morgan (1965) Rocks & Minerals 40:586
'Fayalite-Forsterite Series'
'Feldspar Group'
Localities: Reported from at least 8 localities in this region.
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 17 localities in this region.
'Garnet Group'
Formula: X3Z2(SiO4)3
Localities: Reported from at least 27 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 21 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 33 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 102 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 45 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 39 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'
Formula: Mn, O
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 60 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 111 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 24 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 44 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(Cu4X2)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(Si6O18)(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: Ca19Fe3+Al4(Al6Mg2)(☐4)☐[Si2O7]4[(SiO4)10]O(OH)9
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
'Tetrahedrite'2.GB.05Cu6(Cu4X2)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