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Corundum in Biotite, from Ihosy, Madagascar

Corundum in Biotite, from Ihosy, Madagascar


This specimen measures 1 1/2 x 1 x 2 1/4 inches (4 x 2.5 x 5.5 cm). The corundum occurs as a zoned pink and purple prism 1/2 x 1/4 x 5/8 inches, in biotite. The biotite occurs as a mass of black platelets with minor tiny quartz in many of the interstices. The corundum crystal reacts very strongly under long-wave UV, with indication of zoning. A good-looking and interesting specimen.

Ad Reference ID: 7152a1fadbacd71


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