Choose the exact tool
A focused subject produces more useful fields and fewer unrelated matches.
Identifier category
Rock, Mineral, Gem, and Fossil Identifiers
Identify rocks, minerals, crystals, gemstones, fossils, and meteorite candidates from visible geological clues.
13focused tools
Choose the closest match
Tools in this topic
Rocks & fossils
Rock Identifier
Compare grain size, texture and layering, mineral mix, and other visible clues to find the most likely rock.
Rocks & fossils
Mineral Identifier
Compare crystal habit, luster, cleavage or fracture, and other visible clues to find the most likely mineral.
Rocks & fossils
Crystal Identifier
Compare crystal system, face and termination, transparency, and other visible clues to find the most likely crystal.
Rocks & fossils
Gemstone Identifier
Compare cut or crystal form, color zoning, transparency, and other visible clues to find the most likely gemstone.
Rocks & fossils
Fossil Identifier
Compare preserved anatomy, matrix and texture, symmetry and segmentation, and other visible clues to find the most likely fossil.
Rocks & fossils
Meteorite Identifier
Compare fusion crust, surface regmaglypts, metal grains, and other visible clues to find the most likely meteorite candidate.
Rocks & fossils
Agate and Geode Identifier
Compare banding, cavity shape, crystal lining, and other visible clues to find the most likely agate or geode.
Rocks & fossils
Quartz Identifier
Compare crystal habit, transparency, color zoning, and other visible clues to find the most likely quartz specimen.
Rocks & fossils
Sea Glass Identifier
Compare color, edge rounding, surface frosting, and other visible clues to find the most likely sea glass fragment.
Rocks & fossils
Petrified Wood Identifier
Compare grain pattern, cellular texture, mineral color, and other visible clues to find the most likely petrified wood specimen.
Rocks & fossils
Fossil Shell and Ammonite Identifier
Compare shell coil or valve, rib pattern, suture lines, and other visible clues to find the most likely fossil shell or ammonite.
Rocks & fossils
Ore and Metal Mineral Identifier
Compare metallic luster, streak color, crystal form, and other visible clues to find the most likely ore or metallic mineral.
Rocks & fossils
Rough and Polished Stone Identifier
Compare color and pattern, luster, translucency, and other visible clues to find the most likely rough or polished stone.
How to choose
Start with the subject in the photo
Rock, Mineral, Gem, and Fossil Identifiers use focused visible clues instead of a generic image description. Choose the closest subject so the result format matches the question you are trying to answer.
A photo result is a starting point. Read the evidence and limitations, then verify medical, safety, authenticity, or financial decisions with an appropriate professional or authoritative source.
Make details readable
Keep the complete subject and its identifying details sharp and evenly lit.
Verify important decisions
Use the result as a guide and confirm high-stakes conclusions independently.
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