Apr
28
Topaz
Topaz is a silicate mineral of aluminium and fluorine with the chemical formula Al₂SiO₄(F, OH)₂. Topaz is found colours such as colourless, blue, brown, orange, grey, yellow, green, pink and reddish-pink. Orangy-Pink and bright yellow to deep golden brown hue topaz are known as Imperial Topaz. Naturally occurring blue topaz is quite rare. Typically, colourless, […]