Photo #402
GHI/Fire with Rubellite (Pink/Red Tourmaline in Quartz/Feldspar Matrix).
Rubellite is a difficult tumble due to the blast mining fractures, mohs hardness differences of the host rock, and the crystalline structure of tourmaline.
Of course it is not as difficult as actual Ruby (Red Corundum)-which I avoid now.
I had forgotten that I still had a large chunk of rough Corundum laying around (UV Photo below).
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