Rock & Mineral Database — Identification Reference | Geo-Gem
A comprehensive visual reference covering hundreds of rock types, minerals, gemstones, and fossils with physical properties and field identification tips.
What's in the Database
The Geo-Gem rock and mineral database includes igneous rocks (granite, basalt, obsidian, pumice), sedimentary rocks (limestone, sandstone, shale, conglomerate), metamorphic rocks (marble, slate, quartzite, schist), minerals (quartz, feldspar, calcite, pyrite, mica), gemstones (amethyst, tourmaline, garnet, topaz), and fossils. Each entry lists hardness (Mohs scale), streak, luster, crystal system, chemical formula, cleavage, common locations, and field identification tips.
Search & Filter
Search by name, filter by category, or browse alphabetically. Each database entry links to related community discoveries so you can see what real specimens of that rock or mineral look like in the field.
Explore Geo-Gem
- AI Rock & Mineral Identification — snap a photo and get an instant AI-powered ID
- Community Discoveries — browse finds from rockhounds around the world
- Field Guide — regional guides to rocks, minerals, and geology
- Rock & Mineral Database — comprehensive identification reference
- Marketplace — buy and sell specimens with verified collectors
- Rockhound Groups — join local clubs and online communities
- Events & Field Trips — upcoming geology events near you
- Leaderboard — top contributors in the community