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Volborthite, Tyuyamunite and Malachite 
Back to MIXED MINERAL AUCTIONS from Collections & New Finds - ENDS MARCH 4
Ridenour Mine, Prospect Canyon Dist., Coconino Co., Arizona
- Starting Time:3/1/2010 01:30:00 AM(CST)
- Ending Time:3/4/2010 06:30:00 PM(CST)
Time Left:Auction Is Closed
- Size:7.9 x 7.9 x 5.4 cm
- Size Description:Small Cabinet
Description:The blocky sandstone matrix is richly covered with tiny, sparkly, olive-green volborthite blades, a dusting of canary-yellow, discrete, microcrystals of the uranium oxide tyuyamunite and aesthetically capped with a vein of green malachite. Volborthite is an uncommon hydrated copper vanadate secondary mineral found in the oxidized zones of vanadium-bearing hydrothermal deposits. This showy specimen is a highly representative combination piece featuring these uncommon species. Valued at $300-400
