Gemstone Mineral Groups

Classified List Of Minerals

Group	Series Or Subgroup	Species/Chemical Formula
Silica group		quartz – Si02 cristobalite – SiO2 tridymite – SiO2 coesite – SiO2 stishovite – SiO2
Feldspar group	potassium feldspar	orthoclase – KAlSi3 O8 sanidine – (K,NA)AlSi3O8 microcline – KAlSiO8
	Plagioclase feldspar series	albite – NaAlSiO8 anorthite – CaAl2SiO8
Feldspathoid group		analcime – NaAlSiO6.H2O leucite – KAlSiO6 nepheline – (Na,k)AlSiO4
Scapolite group	Scapolite series	marialite – Na4(AlSi3O8)3Cl meionite – Ca4(Al2SiO8)3(CO3,SO4)
Zeolite group		natrolite – Na2AlSi3O10.2H2O chabazite – CaAl2Si4O12.6H2O heulandite – CaAl2Si7O18.6H2O stilbite – CaAl2Si7O18.7H2O sodalite – Na8(Al6Si6O24)Cl2
Other		beryl – cordierite –
Serpentine group	Serpentine minerals	antigorite – chrysotile – lizardite –
Clay mineral group	Smectite subgroup	montmorillonite –
	Illite subgroup	illite –
	Other clays	kaolinite – pyrophyllite – talc –
Mica group	Biotite series	phlogopite – annite –
	Other micas	muscovite – margarite – paragonite – lepidolite –
Chlorite group other sheet silicates		chlorite – prehnite – sepiolite – apophyllite –
Pyroxene group	Orthopyroxene (hypersthene series)	enstatite – ferrosilite –
	Clinopyroxene(diopsidehedenbergite series)	diopside – hedenbergite –
	Other clinopyroxenes	pigeonite – augite – jadeite – spodumene –
Amphibole group	Cummingtonite series	cummingtonite – grunerite –
	Tremolite series	tremolite – actinolite –
	Other	anthophyllite – glaucophane – hornblende – kaersutite –
Pyroxenoid group		wollastonite – rhodonite – pectolite –
Melilite group		ghelenite – akermanite –
Other		tourmaline –
Garnet group	Pyralspite series	pyrope – almandine – spessartine –
	Ugrandite series	uvarovite – grossular – andradite –
Olivine group	Olivine series	forsterite – fayalite –
	Other	monticellite –
Humite group		norbergite – chondrodite – humite- clinohumite –
Aluminosilicate group		kyanite – andalusite – sillimanite –
Other isolated tetrahedral silicates		staurolite – chloritoid – titanite(sphene) – topaz – zircon –
Lawsonite group		lawsonite –
Epidote group		epidote – clinozoisite –
Other paired tetrahedral silicates		vesuvianite –
Native metal group		gold – silver – platinum – copper –
Native semimetal group		arsenic – antimony – bismuth –
Native nonmetal group		diamond – graphite – sulfur –
Tetrahedral sulfide group		chalcopyrite – bornite – enargite – wurtzite – sphalerite –
Octahedral sulfide group		galena – pyrrhotite – niccolite –
mixed sulfide group		pentlandite –
Other sulfides,Arsenides, and sulfosalts	Sulfides	molybdenite – millerite – cinnabar – covellite – chalcocite – argentite – pyrite – cobalite – marcasite –
	Arsenides and sulfosalts	arsenopyrite – sutterudite – stibnite – boulangerite – tetrahedrite – proustite – pyrargyrite – orpiment – realgar –
Halide		halite – sylvite – chlorargerite – atacamite – carnallite – fluorite – cryolite –
Tetrahedral oxide group		zincite –
Octahedral oxide group	TiO2 minerals	anatase – rutile – brookite –
	Other octahedral oxides	periclase – hematite – corundum – ilmenite – cassiterite – pyrolusite – columbite – tantalite –
Spinel group	“Inverse” spinels	spinel – magnetite –
	“Normal “spinels	chromite – franklinite –
Cubic oxides		uraninite –
Other oxides		chrysoberyl – perovskite – cuprite –
Hydroxide group		gibbsite – brucite – manganite – goethite – diaspore – lepidocrocite – romanechite –
Calcite group		calcite – magnesite – siderite – rhodochrosite – smithsonite –
Dolomite group		dolomite – ankerite –
Aragonite group		aragonite – witherite – strontianite – cerussite –
Other carbonates		malachite – azurite – trona –
Nitrate group		nitratite – niter –
Anyhdrous borate group		boracite – sinhalite –
Hydrous borate group		borax – kernite – ulexite – colemanite –
Anhydrous sulfate group		anhydrite – barite – celestite – anglesite –
Hydrous sulfate group		gypsum – chalcanthite – epsomite – antlerite – alunite –
Tungstate group	Wolframite series	huebnerite – ferberite –
	Other tungstates	scheelite –
Molybdate group		wulfenite – powellite –
Chromate group		crocoite
Phosphate group		monazite – triphylite – apatite – pyromorphite – amblygonite – lazulite – wavellite – vivianite – variscite – turquoise – autunite –
Vanadate group		vanadinite – carnotite –
Arsenate group		erythrite – scorodite –