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Collinsite

#61709
SOLD
Collinsite from Tip Top mine, Custer Co., South Dakota, United States - 61709
Collinsite from Tip Top mine, Custer Co., South Dakota, United States - 61709

Collinsite

#61709
Availability
Sold
Size
4 x 3.6 x 3 cm - Miniature 
Formula
Ca2Mg(PO4)2·2H2O (RRUFF)
Locality
Tip Top mine, Custer Co., South Dakota, United States
Tagged
phosphate , pegmatite mineral

White to colorless fish-shaped crystals with pointed terminations as random singles and smaller radiating groups. The single crystals measure less than 0.75mm. I'm a little curious about the radiating groups. I have not noticed these groups before from the Tip Top mine. The matrix is Heterosite. 

Collinsite

Formula
Ca2Mg(PO4)2·2H2O 
Crystal System
Triclinic 
Cleavage
Perfect, Perfect, None 
Luster
Silky 
Color
colorless, white, light brown 
Streak
white 
Class
Triclinic - Pinacoidal 
Fracture
Brittle 
Hardness
3-3.5 

Data courtesy of Webmineral.

Collection
William & Anne Cook Collection
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