Topaz (mineral)

Topaz crystals, a selection of specimens of this crystallized mineral species. The topaz is a mineral, here many pieces of collection presented with a description, one or more photos and sometimes a video. These topazes are for sale.
It is a silicate, a subgroup of the nesosubsilicates, with the chemical formula Al2SiO4(F,OH)2, and the orthorhombic crystal system.