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Mineralpedia Details for Edoylerite

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Edoylerite

Edoylerite

Named for American mineral collector who specialized in mercury minerals, Edward H. Oyler. Edoylerlite is a rare mineral that can be found only at the type locality in the Clear Creek claim in the New Idria district in San Benito County, California, USA. There, it occurs as “a rare alteration product of cinnabar, in a mercury deposit in silicate-carbonate rock hydrothermally altered from serpentinite.” Edoylerite is photosensitive and will alter from its common canary yellow to an olive-green color after several months of exposure to the sunlight.

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

Formula
Hg2+3(Cr6+O4)S2 
Crystal System
Monoclinic 
Crystal Habit
Acicular, Prismatic, Stellate 
Cleavage
Good, Fair, None 
Luster
Adamantine 
Color
greenish yellow, orange 
Streak
yellow 
Class
Monoclinic - Prismatic 
Fracture
Brittle - Subconchoidal 
Hardness
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Edoylerite from Clear Creek mine, San Benito Co., California, United States

Edoylerite
            from Clear Creek mine, San Benito Co., California, United States

Micro yellow, acicular crystals sprays to 0.75mm in vug.

2mm vug filled with acicular, bright yellow crystals of the rare Edoylerite.

Click thumbnail images for larger view.

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