Cylinder shape Coral necklace

Necklace made up of Red Coral cut in geometrical forms.
The variety more the appraisal of the Coral is the noble red Coral (Corallium rubrum).
Its color, uniform from one end to another, goes from the tender pink (Coral says "skin of angel") to the red blood of ox, sometimes mottled of white or pink. Source GULF OF BISCAY, CANARY ISLANDS, ARCHIPELAGO OF MALAYSIA, JAPAN.

Hardness on the MOHS scale of hardness: 3-4. Density: 2,60-2.70.