Study Butte, Terlingua District, Brewster Co., Texas, USA

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List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Cinnabar	2.CD.15a	HgS
Marcasite	2.EB.10a	FeS2
Pyrite	2.EB.05a	FeS2
Group 5 - Nitrates and Carbonates
Calcite	5.AB.05	CaCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Alunite	7.BC.10	KAl3(SO4)2(OH)6
Jarosite	7.BC.10	KFe3+ 3(SO4)2(OH)6
Group 9 - Silicates
Albite	9.FA.35	NaAlSi3O8
Analcime	9.GB.05	Na2(Al2Si4O12) · 2H2O
Clintonite	9.EC.35	Ca(Mg,Al)3(Al3SiO10)(OH)2
Epidote	9.BG.05a	{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Grossular	9.AD.25	Ca3Al2(SiO4)3
Montmorillonite	9.EC.40	(Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O
Prehnite	9.DP.20	Ca2Al2Si3O12(OH)
Zoisite	9.BG.10	{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Unclassified Minerals
'Apophyllite'	-
'Asphaltum var: Uintahite'	-

16 entries listed. 14 valid minerals.