THE JOURNAL / Gemstone Identifier
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Showing 145–150 of 150 guides
THE READING ROOM / 09What Is Slag Glass? How to Recognize It and Tell It Apart
Learn what slag glass is, which visible features can help identify it, and how to distinguish clues from proof of composition, age, or value.
Read the guideWhite Crystals: Common Types, Clues, and Identification Limits
Learn how to compare common white crystals, recognize visible clues, and understand what photos and simple observations cannot establish.
Read the guideWhy Crystals Look Different in Photos
Lighting, camera settings, and crystal structure can change how a gemstone appears in a photograph. Learn which visual differences are useful clues—and what photos cannot establish.
Read the guideWhy Do Crystals Have Different Colors?
Crystal color comes from chemistry, trace elements, structural defects, and light. Learn what visible color can suggest—and what it cannot prove.
Read the guideWhy Do Gemstones Change Color?
Gemstones can look different under changing light, surroundings, or viewing conditions. Learn what causes the shifts and what they can—and cannot—tell you.
Read the guideYellow Gemstones: Types, Colors, and How to Identify Them
Explore popular yellow gemstones, their distinguishing features, and what visual clues can—and cannot—tell you about a stone.
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