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Diamonds are mined from the earth, and in the mining process the diamond stones are separated from the other material.

Seventy-five to eighty percent of diamonds are graded as industrial diamonds, and sold in bulk as bort to makers of diamond-coated tools and precision instruments.

The raw, gem-quality stones are moved to a sorting process, where like stones are grouped, and where larger stones are separated out for special treatment in order to maximize their value.

Once a stone reaches the cutting table, it follows a series of steps, including "...planning, cleaving or sawing, bruting, polishing, and final inspection."

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Q: How are diamonds refined and processed?
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