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Gold with Tetradymite

#57437
SOLD
Gold from Golden Crest mine, Summit Co., Colorado, United States - 57437
Gold from Golden Crest mine, Summit Co., Colorado, United States - 57437

Gold with Tetradymite

#57437
Availability
Sold
Size
1.4 x 1 x 5 cm - Miniature 
Formula
Au (RRUFF)
Locality
Golden Crest mine, Summit Co., Colorado, United States
Tagged
native element

A small Quartz piece with leaf Gold to 1mm associated with shiny black, foliated and iridescent Tetradymite. Tetradymite is an uncommon bismuth-tellurium sulfide. Seems like not much is known of this mine. The USGS has a little information (click it). Mindat list it here (click it). Tetradymite is indeed found at the Golden Crest with Gold but interestingly so is Beryl, a typical pegmatite mineral. 

Gold

Formula
Au 
Crystal System
Isometric 
Crystal Habit
Arborescent, Platy, Granular 
Cleavage
None, None, None 
Luster
Metallic 
Color
yellow, pale yellow, orange, yellow white, reddish white 
Streak
yellow 
Class
Isometric - Hexoctahedral 
Fracture
Hackly 
Hardness
2.5-3 

Data courtesy of Webmineral.

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