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.
... of England, was born in about 1477. Together with Perkin Warbeck, he was one of two impostors who threatened the rule of Henry VII of England (reigned 1485 - 1509) ...
Kids.Net.Au - kids safe portal for children, parents, schools and