You asked: How is black diamond formed?

Are black diamonds just coal?

Black diamonds are extremely rare and have been coveted by royalty and celebrities over the last century and a half. Though no evidence exists, King Louis XVIII boasted about his collection of these rare coal colored stones. Are black diamonds real? They are, but they are extremely rare.

Is black diamond Magnetic?

Due to their mineral inclusions, black diamonds are often electrically conductive (unevenly), and sometimes showing magnetism. Indeed, graphite is electrically conductive, while magnetism is found in magnetite and hematite for instance.

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