Cacoxenite	Kakoxen	(Fe+++,Al)25(PO4)17O6(OH)12·75(H2O)
Cahnite		Ca2B(AsO4)(OH)4
Calaverite		AuTe2
Calcioandyrobertsite	IMA1997-022	KCaCu5(AsO4)4[As(OH)2O2]-2(H2O)
Calcite	Travertine Manganocalcite - variety Glendonite - pseudomorph Nicols	CaCO3
Caledonite		Pb5Cu2(CO3)(SO4)3(OH)6
Cancrinite		Na6Ca2Al6Si6O24(CO3)2
Carbonate-fluorapatite	Collophane Dehrnite Francolite Lewistonite	Ca5(PO4,CO3)3F
Carletonite		KNa4Ca4Si8O18(CO3)4(OH,F)·(H2O)
Carminite		PbFe+++2(AsO4)2(OH)2
Carnallite		KMgCl3·6(H2O)
Carnotite		K2(UO2)2V2O8·3(H2O)
Carrollite		Cu(Co,Ni)2S4
Caryopilite		(Mn++,Mg,Zn,Fe++)3(Si,As)2O510(OH,Cl)4
Cassiterite	Staringite-mixture with ferrotapiolite Tin Ore Wood Tin	SnO2
Catapleiite		(Na,Ca,[ ])2ZrSi3O9·2(H2O)
Cavansite		Ca(VO)Si4O10·4(H2O)
Celestine	Celestite	SrSO4
Ceruleite		Cu2Al7(AsO4)4(OH)13·12(H2O)
Cerussite	White Lead Ore	PbCO3
Chabazite	Adipite Acadialite	CaAl2Si4O12·6(H2O)
Chalcanthite	Blue Vitrol Copper Vitrol	CuSO4·5(H2O)
Chalcoalumite		CuAl4(SO4)(OH)12·3(H2O)
Chalcocite	Cocinerite-mixture with silver	Cu2S
Chalcomenite		CuSeO3·2(H2O)
Chalcophyllite		Cu++18Al2(AsO4)3(SO4)3(OH)27·33(H2O)
Chalcopyrite		CuFeS2
Chalcosiderite	Andrewsite	CuFe+++6(PO4)4(OH)8·4(H2O)
Chalcostibite	Wolfsbergite	CuSbS2
Chambersite		Mn3B7O13Cl
Charlesite		Ca6(Al,Si)2(SO4)2B(OH)4(OH,O)12·26(H2O)
Chenevixite		Cu2Fe+++2(AsO4)2(OH)4·(H2O)
Chervetite		Pb2V2O7
Childrenite		Fe++Al(PO4)(OH)2·(H2O)
Chkalovite		Na2BeSi2O6
Chlorargyrite	Horn Silver Embolite-Br Cerargyrite	AgCl
Chlorophoenicite		(Mn,Mg)3Zn2(AsO4)(OH,O)6
Chromite	Chromic iron Chrome iron ore	Fe++Cr2O4
Chrysoberyl	Alexandrite - green	BeAl2O4
Chrysocolla	Bisbeeite	(Cu,Al)2H2Si2O5(OH)4·n(H2O)
Chrysotile	Asbestos	Mg3Si2O5(OH)4
Churchite-(Y)	Weinschenkite	YPO4·2(H2O)
Cinnabar	Cinabre Zinnober	HgS
Clausthalite	Lerbachite Tilkerodite Zorgite	PbSe
Clinobisvanite		BiVO4
Clinochlore (var Kammererite)	Kammererite - Red Clinochlore (var Kammererite Sheridanite Ripidolite Prochlorite Pennine Colerainite Penninite	(Mg,Fe++)5Al(Si3Al)O10(OH)8
Clinoclase		Cu3(AsO4)(OH)3
Clinohedrite		CaZnSiO4·(H2O)
Clinohumite	Titanclinohumite	(Mg,Fe++)9(SiO4)4(F,OH)2
Clinoptilotite		(Na,K,Ca)2-3Al3(Al,Si)2Si13O36·12(H2O)
Clinotyrolite		Ca2Cu9[(As,S)O4]4(OH)10·10(H2O)
Clinozoisite		Ca2Al3(SiO4)3(OH) = Ca2AlAl2(SiO4)(Si2O7)O(OH)
Cobaltite		CoAsS
Cobaltomenite		CoSeO3·2(H2O)
Colemanite	Neocolmanite	Ca2B6O11·5(H2O)
Collinsite		Ca2(Mg,Fe++)(PO4)2·2(H2O)
Conichalcite	Higginsite	CaCu(AsO4)(OH)
Connellite	Ceruleofibrite Footeite	Cu19Cl4(SO4)(OH)32·3(H2O)
Copiapite	Janosite Misy	Fe++Fe+++4(SO4)6(OH)2·20(H2O)
Copper	Cuivre Kupfer	Cu
Coquimbite		Fe+++2(SO4)3·9(H2O)
Cordierite	Dichroite Iolite	Mg2Al4Si5O18
Cordierite (Iolite)	Dichroite Iolite	Mg2Al4Si5O18
Cornetite		Cu3(PO4)(OH)3
Cornwallite	Erinite	Cu5(AsO4)2(OH)4
Corundum	Ruby - red Sapphire - blue Leucosapphire - colorless	Al2O3
Covellite	Covelline	CuS
Creedite		Ca3Al2(SO4)(F,OH)10·2(H2O)
Cristobalite		SiO2
Crocoite	Red Lead Ore	PbCrO4
Cronstedtite		Fe++2Fe+++(SiFe+++)O5(OH)4
Cryptomelane	Psilomelane	K(Mn++++,Mn++)8O16
Cubanite	Chalmersite	CuFe2S3
Cumengite	Cumengeite	Pb21Cu20Cl42(OH)40
Cuprite	Red oxide of copper Chalcotrichite	Cu2O
Cuprosklodowskite	Jachimovite Jachymovite	Cu[(UO2)(SiO2OH)]2·6(H2O)
Cuprostibite		Cu2(Sb,Tl)
Curienite		Pb(UO2)2V2O8·5(H2O)
Curite		Pb3+x(H2O)2[(UO2)4+x(OH)3-x]2, x~0.5
Cyanotrichite	Lettsomite	Cu4Al2(SO4)(OH)12·2(H2O)