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Gilmarite

#49642
SOLD
Gilmarite from prospect near Rhyolite Pass, Mineral Co., Nevada, United States - 49642
Gilmarite from prospect near Rhyolite Pass, Mineral Co., Nevada, United States - 49642

Gilmarite

#49642
Availability
Sold
Size
4 x 3 x 3 cm - Miniature 
Formula
Cu2+3(AsO4)(OH)3 (RRUFF)
Locality
prospect near Rhyolite Pass, Mineral Co., Nevada, United States
Tagged
arsenate , copper

Bladed Bluish green Gilmarite crystals with pointed and slightly rounded terminations less than 0.5mm in length. The group sits in a 2mm vug of a porphyritic matrix which is heavily pitted. These pits are often filled with other minerals including Conichalcite and Cornwallite. This is one of the better specimens I have obtained. Gilmarite is a rare mineral and this marks the second occurence in the USA. Tested and confirmed by XRD in 2011.

XRD Confirmed

Gilmarite

Formula
Cu2+3(AsO4)(OH)3 
Crystal System
Triclinic 
Crystal Habit
Rosette, Microscopic Crystals 
Cleavage
None, None, None 
Luster
Vitreous (Glassy) 
Color
greenish blue 
Streak
greenish blue 
Class
Triclinic - Pedial 
Fracture
Brittle - Irregular 
Hardness
3 

Data courtesy of Webmineral.

Special Info
XRD Confirmed
Mineralpedia
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