which is called black diamond
rahul919:
coal
coal
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hiiii mate here is the answer
coal is known as black diamond
hope it may help you
coal is known as black diamond
hope it may help you
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Carbonado, commonly known as the "black diamond", is the toughest form of natural diamond. It is an impure form of polycrystalline diamond consisting of diamond, graphite, and amorphous carbon. It is found primarily in alluvial deposits in the Central African Republic and in Brazil.
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