dash is a substance as hard as diamond
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(PhysOrg.com) -- Currently, diamond is regarded to be the hardest known material in the world. But by considering large compressive pressures under indenters, scientists have calculated that a material called wurtzite boron nitride (w-BN) has a greater indentation strength than diamond
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Cubic Boron Nitride In the cubic form of boron nitride, alternately linked boron and nitrogen atoms form a tetrahedral bond network, exactly like carbon atoms do in diamond.
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Moissanite is similar to diamond in several important respects: it is transparent and hard (9-9.5) on the.
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