Minerals, Crystals, and Geology
A master collection of mineralogical guides — covering classification, identification by photo, rare crystal finds, and expert geological insights.
Yellow & Color-Changing Stones
Interactive guide to identifying minerals by color, luster, and hardness. Find out what stone you have.
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How to Identify Minerals with Your Smartphone
Stop guessing and start identifying. This beginner's guide reveals the rapid 1-2-3 triple-photo workflow to get professional-grade mineral identification at home using just your phone and the Minerals Guide app.
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How to Photograph Minerals for AI Identification
Unlock the secrets of professional mineral photography and take your collection cataloging to the next level. This comprehensive masterclass covers the essential 'Standard Three' technique—Overview, Macro, and Transmitted Light—that provides the data density required for precision AI identification. From DIY lighting diffusers to advanced macro hacks and geode internal optics, learn how to capture every crystalline detail with museum-grade clarity using just your smartphone.
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Tourmaline Identification Guide
Master the art of identifying tourmaline by its incredible color range, triangular cross-sections, and natural pleochroism.
How to Photograph Minerals for AI Identification
Unlock the secrets of professional mineral photography and take your collection cataloging to the next level. This comprehensive masterclass covers the essential 'Standard Three' technique—Overview, Macro, and Transmitted Light—that provides the data density required for precision AI identification. From DIY lighting diffusers to advanced macro hacks and geode internal optics, learn how to capture every crystalline detail with museum-grade clarity using just your smartphone.
How to Identify Minerals with Your Smartphone
Stop guessing and start identifying. This beginner's guide reveals the rapid 1-2-3 triple-photo workflow to get professional-grade mineral identification at home using just your phone and the Minerals Guide app.
Ruby vs. Spinel Identification
Ruby or Spinel? Uncover the legendary history of these red gems. This expert guide dives into optical properties, crystal systems, and microscopic 'silk' inclusions to help you separate the world's most beautiful crimson stones.
Opal Patterns Guide
Expert guide to identifying opal play-of-color patterns and verifying natural gemstones.