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,...
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...
