Abalone shell is a particularly prized type of mother-of-pearl, as it displays iridescence unmatched by any other mollusk.
Akoya pearls tend to be the most consistently round and near-round pearls, which makes them perfect for matching for multi-pearl jewelry.
Amber is the ancient fossilized resin of trees that grew in forests millions of years ago.
Ammolite is a gem that comes from the fossilized shell of an extinct, squid-like creature called an ammonite.
Copal can be thought of as 'baby amber.' Like its much older counterpart, it is a hardened resin that originated as tree sap.
Coral has been prized throughout history for its natural beauty. Like pearl, coral is also an organic gem consisting of more than 90% calcium carbonate.
South Sea Pearls
Highly coveted South Sea pearls are often described as the pinnacle of cultured pearls--they're certainly among the most rare and expensive available.
The humble freshwater mussel, while not as widely celebrated as its cousin the oyster, is capable of producing high-quality pearls.