Gageite (Mn,Mg,Zn)42Si16O54(OH)40
GalenaBlue Lead
Lead Glance
PbS
Galkhaite (Cs,Tl)(Hg,Cu,Zn)6(As,Sb)4S12
Gaspeite (Ni,Mg,Fe++)CO3
Gaudefroyite Ca4Mn+++3-x(BO3)3(CO3)(O,OH)3
GaylussiteGay Lussite
Natrocalcite
Na2Ca(CO3)2·5(H2O)
Genthelvite Zn4Be3(SiO4)3S
Georgiadesite Pb4(AsO3)Cl4(OH)
GersdorffiteGray nickel pyrites
Nickel glance
NiAsS
GibbsiteHydrargyllite
Al(OH)3
Gilalite Cu5Si6O17·7(H2O)
GismondineAbrazite
Aricite
Gismondite
Ca2Al4Si4O16·9(H2O)
GlauberiteGlauber's Salt
Na2Ca(SO4)2
Glaucodot (Co,Fe)AsS
Gmelinite (Na2,Ca)Al2Si4O12·6(H2O)
Goedkenite (Sr,Ca)2Al(PO4)2(OH)
GoethiteAcicular iron ore
Limonite
Needle ironstone
Fe+++O(OH)
GoldElectrum - Ag Alloy
Oro
Au
Gonnardite Na2CaAl4Si6O20·7(H2O)
Goosecreekite CaAl2Si6O16·5(H2O)
Gordonite MgAl2(PO4)2(OH)2·8(H2O)
Gormanite Fe++3Al4(PO4)4(OH)6·2(H2O)
Goudeyite (Al,Y)Cu6(AsO4)3(OH)6·3(H2O)
GoyaziteHamlinite
Lusungite
Bowmanite
SrAl3(PO4)2(OH)5·(H2O)
GraphiteBlack Lead
Plumbago
C
Gratonite Pb9As4S15
Greenockite CdS
GrossularTsavorite - emerald green
Hessonite - brownish orange
Grossularite
Ca3Al2(SiO4)3
Guerinite Ca5(AsO3OH)2(AsO4)2·9(H2O)
Guilleminite Ba(UO2)3(SeO3)2O2·3(H2O)
GypsumAlabaster
Selenite
Satin Spar
CaSO4·2(H2O)
GyroliteCentrallasite
NaCa16Si23AlO60(OH)8·64(H2O)