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 people (58.0% of the population) lived in owner-occupied housing units and 21 people (42.0%) lived in rental housing units. Topaz is served by the Antelope Valley Fire Protection District, which was formed in 1947 and covers of the Antelope Valley. The District maintains a fire station in Topaz. Topaz is served by the Antelope Valley Water District, which was formed in 1961. 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