Brown button Amber necklace

Necklace of 60 cm made up of Brown Amber reconstituted in button with an active range until 22mm of width.
Amber is the fossilized resin of the pines (pinus will succinifera) which existed 50 million years ago, during the Eocene (beginning of the tertiary era).
Largest Amber dépot of the world is located in Samland (old Prussia Orientale).
Hardness on the MOHS scale of hardness: 2-2.5. Density: 1.05-1.09.