Beautifully set, Caribbean-sea-blue larimar is accented with highly polished sterling silver. Heat and pressure from volcanic lava flows crystallized larimar gemstones eons ago, and they went largely undiscovered until 1974 when a Peace Corps volunteer stumbled across a deposit of the brilliant blue stones along a remote Caribbean seashore. Now it's treasured for its rich blue hues and one-of-a-kind look. The .925 sterling silver pendant with filigree bail cradles the 8mm x 11mm pear-shaped bezel-set larimar. An 18" adjustable slider chain complete with lobster claw complements the piece.