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Mineralpedia Details for Gilmarite

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Gilmarite

Gilmarite

Named in honor of Gilbert Mari, a mineralogist at the University of Nice-Sophia Antipolis in France who collected the material that the mineral was later found in. Gilmarite is a rare mineral that occurs with other copper arsenates and copper arsenides in oxidized deposits. Localities include in France, Germany, Chile, and Hungary.

Ref. Handbook of Mineralogy, Anthony et al (1995) and MSA at http://www.handbookofmineralogy.org/pdfs/gilmarite.pdf

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
WebMineral
View Gilmarite 
Mindat
View Gilmarite 

Gilmarite from Guanaco, Santa Catalina, Antofagasta, Chile

Gilmarite
            from Guanaco, Santa Catalina, Antofagasta, Chile

Blue elongated crystals lining a 4mm vug associated with Conichalcite.

Bluish green compact aggregates of Gilmarite to 0.75mm

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Gilmarite from prospect near Rhyolite Pass, Mineral Co., Nevada, United States

Gilmarite
            from prospect near Rhyolite Pass, Mineral Co., Nevada, United States
Special Info
XRD Confirmed,EDS Confirmed

Tiny little Gilmarite crystals in a 1.5mm vug with Cornwallite. This is a little known locality. XRD/EDS.

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