Barite (Baryte) Barite is a fairly common mineral that may superficially resemble calcite. It is usually found as a colourless mass but may form prismatic or tubular crystals or may be found to form granular aggregates. Barite is found in South Africa, Namibia,...
Aragonite Aragonite is often found in caves and can be found in South Africa, Namibia and Zimbabwe. Many stalactites and stalagmites are composed of aragonite and when unstable may convert to calcite. Aragonite usually forms smooth but botryoidal masses referred to as...
Vanadinite Vanadinite is easily identifiable by its perfect hexagonal crystals. The crystals are invariably a vibrant red but can be various shades from amber, to brown and red as well as brown and yellow. Vanadinite is found in South Africa, Namibia and Zimbabwe...
Mimetite Mimetite is a secondary mineral which is found in lead deposits where it forms during the oxidation process of the lead. Deposits have been found in South Africa, Namibia and Zimbabwe. Mimetite is known to be found in yellow, blue, brown and yellow mixed with...
Epidote Epidote can be tea coloured to yellowish green, green and brown. It occurs in many forms, mostly in metamorphosed calcium rich rocks but also known in pegmatites. Chemical Formular : {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH) Refractive Index : 1.73 – 1.76...
