Lonsdaleite static press or using explosives. It has also been produced by chemical vapor deposition, and also by the thermal decomposition of a polymer, poly(hydridocarbyne), at atmospheric pressure, under argon atmosphere, at . It is translucent, brownish-yellow, and has an index of refraction of 2.40 to 2.41 and a specific gravity of 3.2 to 3.3. Its hardness is theoretically superior to that of cubic diamond (up to 58% more), according to computational simulations, but natural specimens exhibited somewhat lower hardness through a large range of values (from 7 to 8 on Mohs hardness scale). The cause is speculated as being due
Topaz, California Topaz, California Topaz (also, Topaz Post Office) is a census-designated place in Mono County, California. It is located north of Coleville, at an elevation of 5033 feet (1534 m). Topaz's ZIP Code is 96133. The population was 50 at the 2010 census. The Topaz post office opened in 1885, closed in 1922, and re-opened in 1926. The name was transferred from the original site of the village, which developed on the ranch of T.B. Rickey. Mrs. Rickey named it based on the color of the local quaking aspen trees. The post office is now located and has been operated by