Rocks & Minerals
Agates, geodes, quartz, obsidian and everyday rocks, sorted by the tests that actually work.
16 field notes
- How to Identify Gneiss (the Banded Metamorphic Rock)FN-0254 · · 6 min read
- How to Identify Limestone (and Tell It From Other Rocks)FN-0251 · · 6 min read
- How to Identify Citrine (Real vs. Fake)FN-0249 · · 7 min read
- How to Identify Opal (Real vs. Fake)FN-0246 · · 7 min read
- How to Identify Granite (and Tell It From Other Rocks)FN-0244 · · 7 min read
- How to Identify Jade (Real vs. Fake)FN-0239 · · 7 min read
- How to Identify Turquoise (Real vs. Fake)FN-0238 · · 8 min read
- How to Identify Amethyst (Real vs. Fake)FN-0234 · · 8 min read
- How to Identify Fluorite (Crystals, Colors, and Fakes)FN-0225 · · 8 min read
- How to Identify Obsidian (and Tell It From Fake Glass)FN-0217 · · 6 min read
- How to Identify Agate (and Tell It From Common Rocks)FN-0213 · · 6 min read
- Quartz vs. Calcite: How to Tell the Two Minerals ApartFN-0208 · · 7 min read
- How to Identify a Geode (Inside and Out)FN-0204 · · 6 min read
- How to Tell If a Rock Is a Meteorite (Real Tests)FN-0201 · · 7 min read
- Fool’s Gold vs. Real Gold: How to Tell Pyrite From GoldFN-0197 · · 6 min read
- How to Identify a Gemstone or CrystalFN-0009 · · 6 min read
Field guides
- How to Identify Common Rocks and Minerals
- Rocks and Minerals of Arizona: Identification Guide
- Rocks and Minerals of Colorado: Identification Guide
- Rocks and Minerals of California: Identification Guide
- Rocks and Minerals of North Carolina: Identification Guide
- Rocks and Minerals of Michigan: Identification Guide
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