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Quartz with Calcite

#37706

Quartz with Calcite

#37706
Availability
Sold
Size
10.5 x 6.5 x 405 cm - Cabinet 
Formula
SiO2 (RRUFF)
Locality
Homestake mine, Lawrence Co., South Dakota, United States

Waterclear Quartz crystals to over 1cm, mostly encrusted with a second generation of Quartz and Dolomite. There is one 8mm Pyrite crystal.

Quartz

Formula
SiO2 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Druse, Crystalline - Fine 
Cleavage
Indistinct, None, None 
Luster
Vitreous (Glassy) 
Color
brown, colorless, violet, gray, yellow 
Streak
white 
Class
Trigonal - Trapezohedral 
Fracture
Conchoidal 
Hardness

Data courtesy of Webmineral.

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