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but it appears that the rich color is due to a micro coating of transparent Quartz on top of the Vauxite
it also has remarkably SMOOTH and LUSTROUS faces on several sides
and you can spend a great deal of time looking at it under magnification to see all of the impressively well-preserved insects inside
white to off-white color
This specimen is from the 2009 finds in the Machacamarca mining district in Bolivia
Cassiterite with Siderite and Quartz cabinet but it appears that theThe quality of the Cassiterites on this specimen is outstanding. Theyre very sharp, smooth and lustrous, and good sized for the material! Several fantastic, very sharp, eye catching, highly lustrous, jet black to golden colored, amazingly well formed cyclic twinned crystals are aesthetically intergrown with tan compressed rhombohedra of Siderite. There are actually a few small Quartz crystals on the piece as well for a final touch. Very minimal
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