Lonsdaleite is also known as "hexagonal diamond." It has an index of refraction from 2.40 to 2.41, a density from 3.2 to 3.3, and a hardness of 3.00.
... knobs or spikes to allow greater penetration of armour. It, like the war hammer and various other weapons of the time, came about because of the increased use of mor ...
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