Rock Identifier & Crystal ID

Nextdio

In-app purchases

About this app

You picked it up because something about it stopped you. Now it's sitting on a shelf or in a drawer, and you still don't know what it is or whether it's worth anything.

Rock Identifier turns your camera into a field guide. Photograph any rock, crystal, gem, or mineral and get back its species, variety, Mohs hardness, rarity, and an estimated market value range, so you know what you're actually holding.

Identify any specimen
Snap a photo or pick one from your gallery. Get the species, variety, hardness, rarity, and a confidence score in seconds, whether it's rough quartz from a creek bed or a polished stone from an estate sale.

Know what it's worth
Every identification includes an estimated USD value range, so you can tell a common pebble from a specimen worth protecting, insuring, or selling.

Get a detailed appraisal
For specimens already in your collection, take a guided set of photos (front, back, detail, coin for scale) to unlock a deeper grade, condition notes, and separate retail, quick-sale, and auction value ranges, plus a draft resale listing.

Build your deck
Save finds to a personal collection, track owned pieces against a wishlist, and watch your total estimated value change over time on a running chart.

Sell with a plan
Once a specimen is appraised, see which venues fit it best, from eBay and Etsy to gem and mineral shows and Facebook groups, ordered by category.

Explore the library
Browse a full catalog of crystals, gemstones, minerals, and rocks by category, with detail pages you can search anytime, scan or no scan.

See your collection's story
Get a rarity breakdown, family-set completion progress, your best find by value, and milestones as your collection grows, with an exportable report for Pro members.

Daily rituals and reminders
Check today's moon phase, pick crystals by intention or zodiac season, and run a timed guided meditation with a stone you own or one we suggest. Opt in to a reminder before the next full moon, and get a new featured stone of the day on your home screen.

Value estimates throughout the app, from scan results to appraisals to your collection total, are market estimates for entertainment and reference, not a certified gemological appraisal. Moon phase and crystal ritual content reflects traditional practice for reflection and enjoyment, not medical or professional advice. For high-value pieces, confirm with a professional appraiser before buying, selling, or insuring.

Built for rockhounds, hikers, thrifters, and anyone who has ever picked up a stone and wondered what it was. Start with your first photo and let your collection take shape from there.