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the Siglo XX specimens are also found with interesting associations and pleasing matrixes
which he referred to as "Windy Ridge"
The Black Cloud Mine was one of the most famous specimen producing locales in Leadville and was one of the last operating mines in Colorado when it closed in 1999
striated cavities where the once preexisting Anhydrite once grew
except for the bottom edge where the piece was removed from the pocket wall
Copper ("Spinel"-twins and crystals) Zircon the Siglo XX specimens areA fantastic toenail sized display specimen of fine crystallized and "Spinel" twinned Copper from this wonderful discovery in Australia. This undamaged, showy, doubly terminated "floater" shows a marvelous combination of sharp, well defined, euhedral crystals of Native Copper along with elongated, striated "Spinel" twins. The piece is highlighted at the top by a wonderful dodecahedral crystal of Copper with both smooth well formed positive faces and
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