Tengizite cabochon, Kazakhstan. 31.36 carats.

Product Code: OBTG01
Units in Stock: 1
Tengizite is the name given to this non-natural Obsidian glass. It formed as a result an explosion at an oil field in Tengiz, Kazakhstan which began in 1985 and took around 12 months to extinguish, with temperatures reaching up to 3000 degrees Farenheit. A 300 metre column of smoke was reported to be visible from 85 miles away. The sedimentary soil, rocks (and even industrial equipment such as bulldozers) melted under the heat of the blaze, resulting in a thin layer of this vitreous colour-banded substance with attractive blue, black, white and pale yellowish brown streaks.
Very little material has been fashioned and, needless to say, availability is extremely limited. This is one of the best in terms of its colour and the thickness of the cabochon.  The brownish-yellow body colour is only visible when the stone is held up to the light (image 2)

weight:  31.36 carats.
shape:  Freeform cabochon
dimensions:  approx. 42.50 x 21.32 x 3.88 mm
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