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2.2" Gemmy Dioptase Crystals on Quartz - Sanda Mine, Congo
This is a beautiful cluster of gemmy dioptase crystals on quartz that was collected from the Sanda Hills occurrences (Sanda mine) in the Republic of the Congo. Botryoidal, blue shattuckite formations can be seen beneath the quartz and on the "back side" of the specimen. This mine has been closed since 2019, so this material is old stock. The entire specimen is 2.2" wide and the dioptase is a lustrous, emerald-green color.
About Dioptase
Dioptase is a showstopper in the mineral world - a copper silicate known for its mesmerizing emerald-green color. Its vivid hues rival even the finest emeralds, although its crystals lack the equivalent clarity. Found in arid, copper-rich environments like the deserts of Namibia and Kazakhstan, dioptase forms stunning prismatic crystals that sparkle like tiny green beacons against contrasting matrix rock. While too soft for most jewelry, it’s a favorite among mineral collectors and museums for its striking visual impact. It has a chemical formula of Cu₆Si₆O₁₈·6H₂O, alternatively reported as CuSiO₂(OH)₂.
Dioptase is a showstopper in the mineral world - a copper silicate known for its mesmerizing emerald-green color. Its vivid hues rival even the finest emeralds, although its crystals lack the equivalent clarity. Found in arid, copper-rich environments like the deserts of Namibia and Kazakhstan, dioptase forms stunning prismatic crystals that sparkle like tiny green beacons against contrasting matrix rock. While too soft for most jewelry, it’s a favorite among mineral collectors and museums for its striking visual impact. It has a chemical formula of Cu₆Si₆O₁₈·6H₂O, alternatively reported as CuSiO₂(OH)₂.
SPECIES
Dioptase, Shattuckite & Quartz
LOCATION
Sanda Hills Occurrences, Mindouli, Mindouli District, Pool Department, Republic of the Congo
SIZE
2.2 x 1.8"
CATEGORY
ITEM
#209676
