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Watermelon Tourmaline Buying Guide

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.

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Ten Gemstones Rarer than Diamond

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.

Cutting Natural Rough Stones: The Breaks

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.

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Paraíba Tourmaline Buying Guide

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.

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Trapiche Gems: An Introduction

Satisfying the human desire for symmetry, trapiche gems have a special allure. Learn what makes these rarities so unique in our introductory article.

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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 buying.

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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 gems.

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Tourmaline Buying Guide

Known for stunning, saturated hues, tourmaline is a colorful and modern gemstone. Read about quality factors for this gem in our tourmaline buying guide.