Vanadinite

Lots of flat orange crystals with some small grains of yellow crystals in between.

Photo by Egen Wark

Reposted from our friend Mineralogy on Google+: Vanadinite is a lead chlorovanadate characterized by red to red-orange hexagonal crystals. It is a secondary mineral found in the oxidized zone of lead deposits resulting from the alteration of vanadiferous sulfides and silicates. A member of the apatite group, vanadinite forms a solid-solution series with its phosphate (pyromorphite) and arsenate (mimetite) analogues. It was first discovered in Mexico in the 19th century and is prized by collectors due to its distinctive color.

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