Peter and Susan

Topaz is a form of aluminum silicate with fluorine. Chemically, a multiple of topaz can be represented by a law Al2SiO4(F,OH)2. Topaz crystals have been in all prismatic, as good as terminate in pyramidal or pick faces. Topaz crystals often have venerable elemental cleavage. Cutting as good as polishing a crystals as gemstones requires sole [...]