Copper Copper occurs in several forms including flat sheets, wire-like fibres and rarely as crystals. Copper can be cleaned with dilute nitric acid, which usually restores the colour and metallic lustre. Copper occurs in the following minerals: Azurite, bornite,...
Chalcopyrite Chalcopyrite is a copper bearing mineral and is of high economic importance. The mineral has a brass-yellow colour to it and may sometimes be iridescent, resembling bornite. Chalcopyrite is found in South Africa, Namibia, Zimambwe, Botswana and...
Chalcocite Chalcocite is associated with other copper bearing minerals such as malachite, azurite, bornite and chalcopyrite. Chalcocite is typically steel-gray in colour. The mineral is found in South Africa, Namibia, Zimbabwe and Botswana. Chemical Formular : Cu2S...
Celestine Celestine crystals are characteristically pale blue and heavy. It is found mainly in limestones and other sedimentary rocks. It can also form during evaporation in arid areas and can be a secondary mineral in some metallic ore deposits. Celestine is found in...
Calcite Calcite is one of the most common minerals in the world and is found in a variety of crystal forms. Calcite also occurs in massive lumps, granular masses and fibrous habits and forms stalactites and stalagmites. Calcite can be found in almost every colour...
