#bayldonite

Another mineral, to the tune of another...

We recently shared a photo showing a mineral that had replaced another during the geological journey through time that those particular rocks were subjected to (see http://on.fb.me/1yoNeiF). It is an example of a pseudomorph, a mineral that progressively takes the place of another, right down to preserving the crystal shape of the original, despite forming in its usual crystal system. Here is another example, of the copper lead arsenate bayldonite (see http://on.fb.me/14NwiEF) standing in for bladed crystals of the lead arsenate mimetite (already formed in turn by the oxidation of primary sulphide minerals into a secondary one, seehttp://on.fb.me/1zo1vvI) Some fluids passed through and their chemistry allowed them to add copper to the mimetite, changing it into one of its cousins. The specimen comes was mined from the upper levels of the Tsumeb mine in Namibia sometime before the first world war, and measures 3.8 x 3.6 x 2.7 cm.

Loz

Bayldonite

Metaphysical Properties: This stone is good for unlocking the holder’s potential. It also brings the holder luck and improves their Heart energy point, enhancing compassion and love in the holder. This stone can also help the holder to come up with new ideas and make decisions and is also useful in enhancing the holder’s ability to be nurturing and understanding. 

Azurite, Bayldonite

Cu3(CO3)2(OH)2, Cu3PbO(AsO3OH)2(OH)2

Locality:

Cap Garonne Mine, Le Pradet, Var, Provence-Alpes-Côte d'Azur, France

Field of View: 3 mm

Photo & Collection: Christophe Boutry

Azurite is named after the Persian word “lazhward”, for its characteristic blue colour. It occurs in the weathered zone of copper ore-bodies usually in association with malachite. Azurite is less stable in open air than malachite and is often pseudomorphically replaced by it. Or they can form together as azurmalachite. Azurite is famous for its superb colour and interesting forms. It was formerly used for azure pigment. It can be cut into cabochons, faceted into gems and used for ornamental objects. Azurite dust is toxic and must not be inhaled when cutting and polishing.