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Kieserite: MgSO4·(H2O)
Comments: Translucent crystalline mass of kieserite with white alteration products. Location: Stassfurt, Sachsen-Anhalt, Germany. Scale: See Photo. © Jeff Weissman / Photographic Guide to Mineral Species
Killalaite: 2Ca3Si2O7·(H2O)
Comments: B&W PPL image of killalaite crystals in a vein of calcite. MinMag v39:544. Location: Thermally metamorphosed limestone near Inishcrone, along the eastern shore of Killala Bay, Co. Sligo, Ireland. Scale: Crystal Size 0.5 mm. © Mineralogical Magazine
Kimuraite-(Y): CaY2(CO3)4·6(H2O)
Comments: Tiny white kimuraite-(Y) crystals in fissures in basalt. Location: Kirigo, Hizen-Cho, Higashi, Matsuura-Gun, Saga Pref., Japan. Scale: Picture size 2cm. © Diederik Visser
Kimzeyite: Ca3(Zr,Ti)2(Si,Al,Fe+++)3O12
Comments: Black isometric crystal of kimzeyite garnet. Location: Kimzey pit, Magnet Cove, Hot Spring County, Arkansas, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Kingite: Al3(PO4)2(F,OH)2·8(H2O,OH)
Comments: White flakes of kingite in matrix. Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Picture size 1.3 mm. © Thomas Witzke / Abraxas-Verlag
Kingsmountite: (Ca,Mn++)4(Fe++,Mn++)Al4(PO4)6(OH)4·12(H2O)
Comments: White, radial spray of kingsmountite crystals. Location: Kings Mountain, Cleveland County, North Carolina, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals
Kinichilite: Mg0.5[Mn++Fe+++(TeO3)3]·4.5(H2O)
Comments: Red masses of kinichilite in quartz. Location: Bambolla Mine,Moctezuma, Sonora, Mexico. Scale: See Specimen Tray. © Sonke Stolze / Systematic Minerals
Kinoite: Ca2Cu2Si3O8(OH)4 Dioptase: CuSiO2(OH)2
Comments: Fibrous crystals of blue-green dioptase to 0.75mm on clear apophyllite associated with dark blue kinoite. Location: Christmas mine, Gila Co., Arizona, USA. Scale: Pictures size 6 mm. © Tom Loomis / Dakota Matrix
Kinoite: Ca2Cu2Si3O8(OH)4 Apophyllite: KCa4(Si4O10)2F·8(H2O)
Comments: Crystals of dark blue kinoite and clear apophyllite. Location: Christmas Mine, Gila County, Arizona, USA. Scale: Crystal size 2.5 mm. © John Veevaert
Kinoite: Ca2Cu2Si3O8(OH)4
Comments: Kinoite crystals as single tabular or platy blue crystals to about 0.3mm and as fan-like sprays. The crystals exhibit striations, a key to distinguishing it from stringhamite. Location: Christmas mine, Gila Co., Arizona, USA. Scale: Picture size 3 mm. © Tom Loomis / Dakota Matrix