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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Obsidian vs. Slag Identification
Expert guide on how to tell natural obsidian from industrial slag glass using diagnostic features.
Pyrite vs. Gold Guide
Master the tests to identify genuine gold nuggets in the field.
Malachite: Spot the Fakes
Expert tips on identifying authentic malachite vs. imitations.
Quartz or Glass? The ID Guide
Stop guessing. Use our diagnostic tool and visual guide to spot real rock crystals.
Moldavite: Real vs Fake
Master the art of Moldavite authentication with our interactive checklist.
Available in other languages
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en Minerals, Crystals, and Geology
- ru Минералы и кристаллы: полный путеводитель
- es Minerales, Cristales y Geología
- fr Minéraux, cristaux et géologie
- de Mineralien, Kristalle und Geologie
- it Minerali, cristalli e geologia
- pt Minerais, Cristais e Geologia
- pl Minerały, kryształy i geologia
- uk Мінерали, кристали та геологія
- tr Mineraller, Kristaller ve Jeoloji
- sv Mineraler, kristaller och geologi
- no Mineraler, krystaller og geologi
- hi खनिज, क्रिस्टल और भूविज्ञान
- id Mineral, Kristal, dan Geologi