The mineral Azurite is dark blue in color and soft. It is obtained by the weathering of the deposits of the copper ore. Its other name is Chessylite, acquired from the Chessy-les-Mines region adjacent to Lyon in France. Azurite’s blue color is extraordinarily distinct and dark.
The chemical formula of Azurite is Cu3 (CO3) 2 (OH) 2.
Derivation of Name
This carbonate mineral has been known since antiquity and was stated in Pliny of the Elder’s Natural History of the Greek under the name kuanos (“deep blue”), and also related to the word ”caeruleum” in Latin.
The form in which the Azurite crystals are obtained is prismatic and tabular with a dark “azure blue” color. Its faces are vitreous and marvelous. There exists more than 45 prominent forms of Azurite and more than 100 are illustrated. The Azurite ore deposits appear most of the time as Malachite and Pseudomorphed, often both are seen together. There exists some confusion between the extremely rare Mrazekite with Azurite.
The blue mineral Azurite is used seldom in jewelry, in the form of beads and occasionally as an ornate stone. But, in due course it loses its softness and its brilliant blue color, which is why its uses are limited. It is mandatory to mount these Azurite stones at room temperature because heating will easily damage them.
Azurite is dispersed in the following places:
- Anthony mine, Pinal Co. USA
- Magdalena, New Mexico
- Alghero and elsewhere in Sardinia, Italy
- Near La Sal, San Juan Co
- Chessy, France
- Touissit mine, Morocco
- Tsumeb, Namibia
- Altai Mountains, Russia
- Chingola mine, Nchanga, Zambia
- New South Wales, Australia
- Guangdong Province, China
- North of Nyngan
Among the two basic carbonate minerals, copper Azurite is one, and brilliant green malachite is the other. Ordinary copper carbonate whose chemical formula is (CuCo3) does not exist naturally. When drops of copper sulfate solution in small quantity are agitated swiftly with a saturated solution of sodium carbonate and left overnight, tiny crystals of Azurite are obtained.
3½ - 4