Corundum Corundum is a crystalline form of aluminium oxide typically containing traces of iron, titanium, vanadium and chromium. It is a rock-forming mineral. It is also a naturally transparent material, but can have different colors depending on the presence of...
Clino-Zoisite Clinozoisite is a complex calcium aluminium sorosilicate mineral with formula: Ca₂Al₃O. It forms a continuous solid solution series with epidote by substitution of iron(III) in the aluminium and is also called aluminium epidote. Clino-Zoisite is found in...
Apatite Apatite is a mineral that forms the basis for a group of minerals namely Flourapatite, Mimetite, Pyromorphite and Vanadinite. There are 19 different species in the group. Apatite can be found in a wide variety of colours depending on which sub category it is...
Beryl Beryl is a hard transparent and durable mineral. The main four varieties include aquamarine, heliodor, morganite and emerald. Beryl is found in South Africa, Zimbabwe, Namibia, and Swaziland. The colour spectrum ranges from Colorless to, green, blue, yellow,...
Tourmaline Tourmaline is the name given to a group of 14 minerals of which elbaite and schorl are the most common. Tourmaline can be found in South Africa, Namibia, Zimbabwe Mozambique and Swaziland. Tourmaline is found in a wide spectrum of colours ranging from...
