Finger For The Gems-Little / Middle
Day Of Wearing-Friday
Lord Of Planet-Shukra
Topaz is a silicate mineral of aluminium and fluorine with the chemical formula Al2SiO4(F,OH)2. Topaz crystallizes in the orthorhombicsystem, and its crystals are mostly prismatic terminated by pyramidal and other faces. It is one of the hardest naturally occurring minerals (mohs hardness of 8) and his the hardness of any silicate) (i.e. silicon -based) minerals.