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...
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...
Analcime Analcime or analcite is a white, grey, or colorless tectosilicate mineral. Analcime consists of hydrated sodium aluminium silicate in cubic crystalline form. Analcime can be found in Namibia. Chemical Formular : Na(AlSi2O6) · H2O Refractive Index : 1.479...
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,...