Tridacna Pearl Buying Guide
Clam pearls can grow to be some of the largest in the world. Learn more about these aquatic gems and how to buy a top-quality tridacna pearl of your own.
4 Minute Read
Related Articles
Calcareous Concretions Value, Price, and Jewelry Information
Several species of marine mollusks produce stony growths called calcareous concretions or non-nacreous pearls. Varieties such as conch pearls, tridacna...
Read More
Conch Pearl Buying Guide
Considering a conch pearl buying trip to the Caribbean? Quality factors for these gems differ from colored gemstones. Before you...
Read More
Quahog Pearl Buying Guide
Your next plate of steamed clams might hold a rare quahog pearl. Learn how to judge the quality of these...
Read More
Melo Pearl Buying Guide
Bright orange colors and flames that seem to dance across the surface make the melo pearl a fascinating gem choice....
Read More
Latest Articles
Hambergite Value, Price, and Jewelry Information
Although hard enough for jewelry use, rare hambergite is a gem for collectors of the unusual. Its combination of high...
Read More
Pearl Simulants: How to Spot Faux Pearls
Some faux pearls can be difficult to identify. Learn about the history and varieties of pearl simulants and how to...
Read More
Opal Buying Guide
Our opal buying guide can help you learn how opals are graded, what to avoid, and how to identify a...
Read More
Amethyst Sources Around the World: The Geological Story Behind These Purple Gemstones
Discover how amethyst forms in volcanic regions worldwide. Learn what makes Brazilian, Uruguayan, and other sources unique, and the geological...
Read More
Never Stop Learning
When you join the IGS community, you get trusted diamond & gemstone information when you need it.
Get Gemology Insights
Get started with the International Gem Society’s free guide to gemstone identification. Join our weekly newsletter & get a free copy of the Gem ID Checklist!