Resembling lustrous petals from an island paradise, dozens of genuine freshwater coin pearls dance along two hand-knotted silk strands. Silver-toned hook clasp. Natural variations will occur with this Dancing Coin Freshwater Pearl Necklace. 18"l. with 2"l. extender. Comes in lovely storage bag. FREE SHIPPING TO UNITED STATES. INTERNATIONAL CUSTOMERS CONTACT US FOR A SHIPPING QUOTE. The only gemstones made by living creatures, rare NATURAL PEARLS are produced by mollusks who layer calcium carbonate around a microscopic irritant. Most pearls used commercially today are FRESHWATER PEARLS, cultured or farmed by implanting a grafted piece of shell into freshwater pearl mussels. SHELL PEARLS, also known as simulated or replica pearls are made from mother-of-pearl. Pearl is the birthstone for June.