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Dolomite on Sphalerite

#AH56124

Dolomite on Sphalerite

#AH56124
Availability
Sold
Size
8 x 7 x 3.5 cm - Sm Cabinet 
Formula
CaMg(CO3)2 (RRUFF)
Locality
Eagle mine, Gilman, Eagle Co., Colorado, United States
Tagged
carbonate

Excellent, sharp, creamy tan Dolomite (or Ankerite) crystals to 8mm. The Dolomite completely covers one side while on the other it is more grey and much of the black Sphalerite is seen. Very nice specimen from the well-known Colorado locality.

Dolomite

Formula
CaMg(CO3)2 
Crystal System
Trigonal 
Crystal Habit
Crystalline - Coarse, Massive, Blocky - Rhombohedral 
Cleavage
Perfect, Perfect, Perfect 
Luster
Vitreous (Glassy) 
Color
white, gray, reddish white, brownish white, gray 
Streak
white 
Class
Trigonal - Rhombohedral 
Fracture
Brittle - Conchoidal 
Hardness
3.5-4 

Data courtesy of Webmineral.

Collection
Arnold G Hampson Collection
Mineralpedia
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On Dakota Matrix
Previously Sold Dolomite
On Dakota Matrix
Other Available Dolomite
WebMineral
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Mindat
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