Malachite and Black-Jet Bracelet 001

It is a mineral of the carbonate group (it is a copper carbonate dihydroxide). Semiprecious stone of green color, is very used in jewelry, covering of columns or elaboration of sumptuary objects, in Antiquity it was used like coloring. It occurs in the oxidation zones, it has its origin in the copper mineral associated with azurite, cuprite and other minerals. The deposits of Colombia, Congo, South Africa, Zimbabwe, Russia, Namibia, Hungary and E.E.U.U. are the most relevant It is effervescent at the touch of hydrochloric acid.

Black-Jet has a compact conformation, is soft to the touch, light and quite hard. In Asturias it is called Acebache or Azebache. The best jet in the world, along with Whithby, is in Asturias in the Jurassic Coast, between Gijón and Ribadasella, with a texture, an intense color and incomparable hardness. Recent studies carried out by a research team of the University of Oviedo, show that the Asturian black-jet comes from a family of Jurassic trees, extinct 65 million years ago.