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 Mountain be as high as $10,000 per carat for faceted stones. A variety of other minerals are found at Topaz Mountain including garnet, amethyst, opal, pseudobrookite and hematite. Topaz Mountain Topaz Mountain is a summit in the Thomas Range of Utah, east of the Thomas caldera. The summit and surrounding area are known for their abundances of semiprecious minerals including topaz, red beryl and opal. Topaz Mountain is part of the Thomas Range in Juab County, Utah, approximately 36 miles Northwest of Delta, Utah. It lies on publicly owned land managed by the Bureau of Land Management (BLM). Collection of rocks