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
Strength of glass have a much higher tensile strength than regular glass (200-500 times stronger than regular glass). This is due to the reduction of flaws in glass fibers and that glass fibers have less surface area than regular glass. Fiberglass's strength depends on the type. S-glass has a strength of while E-glass and C-glass have a strength of . Glass has a hardness of 6.5 on the Mohs scale of mineral hardness. Strength of glass Glass typically has a tensile strength of , however theoretically it can have a strength of which is due to glass's strong chemical bonds. Imperfections on glass