Kalsilite KAlSiO4
Kamotoite-(Y) (Y,Nd,Gd)2U++++++4(CO3)3·14,5(H2O)
Karibibite Fe+++2As+++4(O,OH)9
Kasolite Pb(UO2)SiO4·(H2O)
Keckite Ca(Mn,Zn)2Fe+++3(PO4)4(OH)3·2(H2O)
KermesiteRed Antimony
Pyrantimonite
Sb2S2O
Kidwellite NaFe+++9(PO4)6(OH)10·5(H2O)
Kimzeyite Ca3(Zr,Ti)2(Si,Al,Fe+++)3O12
Kingsmountite (Ca,Mn++)4(Fe++,Mn++)Al4(PO4)6(OH)4·12(H2O)
Kinoite Ca2Cu2Si3O8(OH)4
Klebelsbergite Sb+++4O4(OH)2(SO4)
Kleinite Hg2N(Cl,SO4)·n(H2O)
KolbeckiteSterrettite
ScPO4·2(H2O)
Kolwezite (Cu,Co)2(CO3)(OH)2
KongsbergiteKongsbergite
Silver amalgam (Hg)
Ag2Hg3
Kornelite Fe+++2(SO4)3·7(H2O)
Kovdorskite Mg5(PO4)2(CO3)(OH)2·4.5(H2O)
Krennerite AuTe2
KroxnkiteKroehnkite
Na2Cu(SO4)2·2(H2O)
Ktenasite (Cu,Zn)5(SO4)2(OH)6·6(H2O)
Kulanite Ba(Fe++,Mn,Mg)2Al2(PO4)3(OH)3
Kupletskite (K,Na)3(Mn,Fe++)7(Ti,Nb)2Si8O24(O,OH)7
KyaniteDisthene
Al2SiO5 = Al[6]Al[6]OSiO4