Free Rock, Crystal & Mineral Identifiers
Upload a photo, get ranked identifications with hardness, habit, and field tests. Each identifier is tuned for one kind of specimen — pick the one that fits what you found.
Rock or mineral
Rock Identifier
Free online rock identifier — upload a photo and get three ranked matches with Mohs hardness, typical environment, and the lookalike to rule out. Used by rockhounders in the field.
- Reads banding, luster, fracture, crystal habit
- Mohs hardness range per match
- Names the lookalike to rule out, not just the answer
Open the rock identifier →
Crystal
Crystal Identifier
Free online crystal identifier — upload a photo and identify quartz, amethyst, calcite, fluorite, tourmaline by habit and termination. Returns variety names, not just species.
- Returns varietal names: amethyst, citrine, smoky, not just 'quartz'
- Habit-aware: prismatic, rhombohedral, cubic, dodecahedral
- Lookalike crystals to rule out per match
Open the crystal identifier →
Mineral
Mineral Identifier
Free mineral identifier — upload a photo and identify by color, luster, and crystal habit. Returns Mohs hardness, streak hints, and a diagnostic field test (streak / acid / magnet) to confirm.
- Returns Mohs hardness range per match
- Calls out luster, cleavage, and habit
- Names the streak / acid / magnet test to confirm
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Suspected meteorite
Meteorite Identifier
Free meteorite identifier — upload a photo and get an honest assessment with fusion-crust, magnet, and density cues. Calibrated to call out slag, hematite, and basalt 'meteorwrongs' first.
- Skeptical by default — most submissions are meteorwrongs
- Reads for fusion crust, regmaglypts, and surface density
- Names the most likely terrestrial lookalike per match
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Fossil
Fossil Identifier
Free fossil identifier — upload a fossil photo and get ranked identifications with geological age, host rock context, and a similar fossil to rule out. Built for rockhounders and amateur paleontologists.
- Ammonites, trilobites, teeth, plants, bones, coral
- Geological age estimate per match
- Host rock and depositional environment
Open the fossil identifier →
Want unlimited IDs in the field?
The RockHoundR app works offline, saves every find to your map, and overlays them onto 250,000+ rockhounding spots with geology and land-access data.
