Windham Co., Connecticut, USA

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List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Graphite	1.CB.05a	C
Group 4 - Oxides and Hydroxides
Corundum	4.CB.05	Al2O3
Hematite	4.CB.05	Fe2O3
Magnetite	4.BB.05	Fe2+Fe3+2O4
Quartz	4.DA.05	SiO2
var: Amethyst	4.DA.05	SiO2
var: Milky Quartz	4.DA.05	SiO2
var: Smoky Quartz	4.DA.05	SiO2
Rutile	4.DB.05	TiO2
Group 5 - Nitrates and Carbonates
Bismutite	5.BE.25	(BiO)2CO3
Calcite var: Ferroan Calcite	5.AB.05	(Ca,Fe)CO3
Group 9 - Silicates
Beryl	9.CJ.05	Be3Al2(Si6O18)
Clinochlore	9.EC.55	(Mg,Fe2+)5Al(AlSi3O10)(OH)8
Kaolinite	9.ED.05	Al2(Si2O5)(OH)4
Kyanite	9.AF.15	Al2(SiO4)O
Muscovite var: Fuchsite	9.EC.15	K(Al,Cr)3Si3O10(OH)2
Prehnite	9.DP.20	Ca2Al2Si3O12(OH)
Schorl	9.CK.05	Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Sillimanite	9.AF.05	Al2(SiO4)O
Topaz	9.AF.35	Al2(SiO4)(F,OH)2
Tremolite	9.DE.10	☐{Ca2}{Mg5}(Si8O22)(OH)2
Unclassified Minerals
Limonite	-	FeO(OH) · nH2O
'Scapolite'	-

23 entries listed. 21 valid minerals.