Protective Ring Settings
Some beautiful gems, like pearls, opals, and tanzanites, are very vulnerable to impacts and scratches, especially when worn on rings. Even more…
What is Gemstone Pleochroism?
Some gems show pleochroism, two or three different colors depending on the viewing angle. Learn why this occurs and how it helps gemologists identify…
Tourmaline Engagement Rings: the Ultimate Guide
Thinking about a tourmaline engagement ring? Learn everything you need to know to buy your perfect gem, from hardness and durability to color.…
What’s the Difference Between Synthetic, Simulated, and Created Gemstones?
What’s the difference between synthetic, simulated, and created gemstones? Learn the definitions (and gray areas) of these commonly used terms.…
Understanding the Inner Workings of the Gem Trade
Based on interviews with gem trade experts, this series of FAQs addresses many topics, such as gem value, investing, insurance, and collecting.…
A Faceter’s Guide to Rough Gem Stress
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…
Gemstone Radiation Treatment
Gemstone radiation is a common but little understood technique for altering colors. Learn how it works and what gems usually receive this treatment.…
How Do Tourmalines Form?
Learn about tourmaline formation, where tourmaline is found, and the unusual geological conditions that give this stone its fantastic colors.…
Sapphire Value, Price, and Jewelry Information
Few gems have held our attention over millennia as well as sapphire. The pure blue colors and excellent durability of this gem-quality member of…
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