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Comments: Dark-blue-green crystals of dioptase on matrix. The color of dioptase does not photograph well and must be seen in person to appreciate.
Location: Altyn-tyube, Kasakhstan.
Scale: Crystal size 5 mm.
© Dave Barthelmy
Comments: Emerald green lustrous crystals of dioptase to 14 mm in size and doubly terminated, set upon a limestone and massive calcite matrix.
Location: Altyn-Tyube, South Kazakhstan Oblast', Kazakhstan.
Scale: 3.5 x 4.5 x 2 cm.
© Dan Weinrich
Dioptase: CuSiO2(OH)2 Minrecordite: CaZn(CO3)2
Comments: Blue-green dioptase covered with minute, rhombic crystals of transparent minrecordite one mm or less in size.
Location: Tsumeb Mine, Tsumeb, Namibia.
Scale: Picture size 1 cm.
© John Veevaert
Dioptase: CuSiO2(OH)2 Kinoite: Ca2Cu2Si3O8(OH)4
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