LARGE OCTAHEDRAL DIAMOND CRYSTAL . ...

Description

LARGE OCTAHEDRAL DIAMOND CRYSTAL
Kimberley Mining District, South Africa
The discovery of Diamonds in South Africa in 1866 prompted a massive mining and marketing boom that gave rise to the modern Diamond market. In its heyday, the Kimberley mining district produced over ninety percent of the world's Diamonds. Today, South Africa is still responsible for a significant portion of global Diamond production. The Diamonds are found only in a rare type of volcanic rock called Kimberlite that form narrow vertical channels called "Pipes". The ore from the Kimberlite pipes is crushed to a uniform size to release the raw Diamonds from the matrix rock; during this process larger Diamonds can be broken, making this specimen somewhat unusual, as it is a large Diamond crystal with a classic octahedral form. It weighs 27.95 carats, has typical adamantine luster and measures 19 mm top to bottom and 14 mm across the points.

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