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...
Chalcedony Chalcedony is a cryptocrystalline form of silica, composed of very fine intergrowths of quartz and moganite. These are both silica minerals, but they differ in that quartz has a trigonal crystal structure, while moganite is monoclinic. Varieties of...
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...
Amazonite Amazonite also known as amazonstone is a green tectosilicate is a green mineral made from microcline. This gemstone was named after the amazon river where the mineral was originally discovered. The mineral is used to make statues, amulets and jewellery. The...
Agate Agates are characterized by multiple thin laminations of chalcedony that define distinct banding. many agates are found as amygdales in basalts and other volcanic rocks. Agates can be found in a wide spectrum of colours and can be found South Africa, Namibia,...
