CONCH PEARL
Conch pearls come from the Queen conch mollusk, which lives primarily in the Caribbean Sea. Unlike true pearls, which are composed of nacre and derive from oysters or mussels, conch pearls are calcareous concretions. Conch pearls are extremely rare, and can only be natural rather than cultured, as a method of manufacturing the gem has not yet been devised. The most desirable specimen exhibit a distinctive flame structure which gives them the appearance of a burning fire on the surface.