Pink Coral necklace

Necklace of 45cm composed of pink Coral blanks.
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.