The Moonlight Topaz
Other than the moonstone, there are more minerals with the Moon being part of their name: the moonlight topaz. The topaz is a compound of aluminum, fluorine and silicon and has the hardness value of 8, on the Mohs scale of mineral hardness from 1 (= selenite) to 10 (= diamond). Which means it is a very hard mineral. Topazes exist worldwide, but most findings originate in Brazil. When conditions are favorable for the growth of this mineral, their weight can easily reach up to 220 lb and more. The biggest topaz that was ever found, was 3.3 ft long and weighed 2.5 tons (Mozambique, Africa).