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BORT. it is normally used as an adjective, like Bort diamonds, Bort deposits, and rarely as a noun. do not confuse with B.O.R.T. which is the Brotherhood of Railway Trainmen.

Another Answer

Any rough diamond -- natural rough diamond -- is called a stone, a rock, or a raw diamond.

The descriptor bort is reserved for industrial -- non-gem-quality -- diamonds, which represent about 80% of all diamonds mined. Gem-quality diamonds are usually described as such.

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12y ago

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