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Perhamite with Jarosite

#37672
SOLD
Perhamite from Silver Coin mine, Humboldt Co., Nevada, United States - 37672
Perhamite from Silver Coin mine, Humboldt Co., Nevada, United States - 37672

Perhamite with Jarosite

#37672
Availability
Sold
Size
5 x 4 x 3 cm - Miniature 
Formula
Ca3Al7.7Si3P4O23.5(OH)14.1·8H2O (RRUFF)
Locality
Silver Coin mine, Humboldt Co., Nevada, United States
Tagged
phosphate

It's hard to tell from the photos but the Perhamite is rather nice and occur as platy aggregates of pearly crystals. The Jarosite, the amber colored crystals, are also quite nice.

Perhamite

Formula
Ca3Al7.7Si3P4O23.5(OH)14.1·8H2O 
Crystal System
Hexagonal 
Crystal Habit
Platy 
Cleavage
Perfect, None, None 
Luster
Vitreous (Glassy) 
Color
light brown, white 
Streak
white 
Class
Hexagonal - Dihexagonal Dipyramidal 
Hardness
5 

Data courtesy of Webmineral.

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