Malachite and Black-Jet Bracelet 001

205.00

Malachite, Asturian Black-Jet and Silver Bracelet (925 & 999 silver)

1 in stock

SKU: mqazp001bra Category: Tag:

MALACHITE

Natural Malachite

HARDNESS: 4
DENSITY: 4,0 g/cm3
SCRATCH: Light green
BRIGHTNESS: Vitreous, matte, earthy
EXFOLIATION- FRACTURE: Perfect - Conchoidal to Irregular
CRYSTALLIZATION: Monoclinic system
TRANSPARENCY: Opaque

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

Natural Black Jet

HARDNESS: 3 – 4
DENSITY: 1,2 – 1,3 g/cm3
SCRATCH: Dark brown
COLOR: Bright black
BRIGHTNESS: Vitreous
EXFOLIATION- FRACTURE: Concoidea
CRYSTALLIZATION: Orthorhombic system
TRANSPARENCY: Opaque
LUMINESCENCE: Yellowish green

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.