JRB09 Jeromite on Quartz
Kami Mine, Ayopaya Prov., Cochabamba Dept., Bolivia
19.0x 14.0x 5.9 cm
$880

A very rich example of jeromite on quartz.  The "jeromite" is not actually a mineral-- it is an arsenic, selenium, sulfur glass that lacks a definite crystal structure (hence the "glass" term) best known from this mine.  In the past, I have seem small single quartz crystals coated with this orange-red material, but this discovery is the first time that I have seen such rich examples.
All of these have at least some quartz crystals broken off, it is inescapable, though they display exactly as shown.  I would also say the color is a particular draw with these, as it's certainly better than the more common material with color caused by iron oxide, that comes from various worldwide localities .   







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