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Spinel-twinned Copper (old classic) 
Back to Collection Liquidation Auctions - end Feb 25
Champion Mine, Houghton Co., Michigan
- Starting Time:2/20/2010 06:45:00 PM(CST)
- Ending Time:2/25/2010 06:49:40 PM(CST)
Time Left:Auction Is Closed
- Size:5.3 x 2.3 x 1.3 cm
- Size Description:Large Miniature
Description:A classic and striking copper specimen from the famous Champion Mine of Michigans famed Copper Country. Fabulous, dentritic groupings of spinel-twinned copper crystals spring outward from a single long "backbone" of curved spinel-twinned copper. The crystals have a nice variable patina, which in some places is further accented with a red cuprite coating. This form of copper crystals was classified as Type I branching by Dana in 1886. The historic Champion Mine operated from 1902 to 1967and this is probably an old-timer, as it is very high quality. The floater specimen in the horizontal view looks like a large bird with spread wings. Valued at $500-750
