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Lapislazuli Pendant 004

100.00

Lapislazuli, Amber, Asturian Black-Jet and Silver Pendant 004 (925 & 999 silver)
On sale due to a small superficial scratch (almost invisible – see pictures).

1 in stock

LAPISLAZULI

Natural Lapis Lazuli

HARDNESS: 5,5
SCRATCH: White, light blue.
BRIGHTNESS: Vitreous, smeary in fractures
EXFOLIATION- FRACTURE: Perfect to uneven fracture. Conchoid.
CRYSTALLIZATION: Well-formed crystals, arranged in fracture planes.

Semiprecious stone composed of minerals lazurite, calcium silicate (provides the blue color), wollastonite and calcite (gray and whitish veining) and pyrite (golden reflections). It comes from Afghanistan and northern Chile. Much appreciated since Antiquity, in the Middle Ages it was worth more than gold. Unlike similar stones such as azurite, it does not effervesce in contact with 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.