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Source page: http://commons.wikimedia.org/wiki/File:Corundum-denv08-27b.jpg


English: Corundum
Locality: Winza, Mpapwa, Mpapwa (Mpwampwa) District, Dodoma region, Tanzania (Locality at mindat.org)
Size: thumbnail, 1.8 x 1.3 x 1.1 cm
Corundum var. Ruby
This is a NEW RUBY MINE, and has been producing amazing bicolored red/purple rough for the gem trade recently but FEW crystals have been preserved. This matrix hosts a sharp, gemmy, intensely colored crystal of nearly 1 cm. It is obviously twinned, and REALLY is much more dramatic in person. In shifting lights, these change color and can show a bit of purple/blue color, even. I am told that normally even small examples of this material are cut for facet rough, and this specimen was one of the few collector-worthy pieces, saved from cutting by a good gem dealing friend of mine who throughtfully sold it to me based on carat weight - but hey, at least he didn't cut it before trying to preserve it!
Deutsch: Korund
Fundort: Winza, Mpapwa, Distrikt Mpapwa (Mpwampwa), Dodoma region, Tansania (Fundort bei mindat.org)
Größe: 1.8 x 1.3 x 1.1 cm
Date before March 2010(2010-03)
Source Image: http://www.irocks.com/db_pics/pics/denv08-27b.jpg, Description: http://www.irocks.com/render.html?species=Corundum&page=0
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