Everything you ever wanted to know about rubellite. Find value guidelines, scientific data, expert comments, and more in our Gemstone Listings.
Visit one of the top gem hunting spots in the US. Go alone or with the family. A gemology-themed vacation can be fun, educational, and (maybe) profitable.
Looking for a fun summertime gem? Watermelon tourmaline adds a pop of color that's perfect for a playful summer look. Learn about the quality factors for this gem in our watermelon tourmaline buying guide.
From the seemingly common to the utterly obscure, you wouldn't guess these ten gemstones are rarer than a diamond! If you're looking for something unique for your next jewelry purchase, check out these ten stunning gemstones rarer than diamond.
If you’re cutting natural rough gems, learn to expect fractures. Stress from an unknown flaw can break out during roughing, faceting, or even polishing.
Paraíba’s neon blue hues stunned the gem world in the 1980s. Read about the quality factors for this striking gem in our paraíba tourmaline buying guide.
Satisfying the human desire for symmetry, trapiche gems have a special allure. Learn what makes these rarities so unique in our introductory article.
Gem stress can cause stones to break during faceting. Learn what techniques may reduce the odds of fracturing and how to spot problem rough before buying.
Some gems show pleochroism, two or three different colors depending on the viewing angle. Learn why this occurs and how it helps gemologists identify gems.
Known for stunning, saturated hues, tourmaline is a colorful and modern gemstone. Read about quality factors for this gem in our tourmaline buying guide.