Overview
Colorado's mountains hold a legendary mineral heritage, from the gold and silver that built the state to world-class crystal specimens of rhodochrosite, amazonite, and topaz. Its pegmatites and old mining districts draw collectors from everywhere.
This guide covers common and iconic Colorado minerals — how to recognize them by color, luster, and crystal form. Photograph your specimen from a couple of angles and use the app to help confirm what you have found.
Key Species to Know
Rhodochrosite
Rhodochrosite
Colorado's state mineral — a raspberry-to-rose-red manganese carbonate, famous for the spectacular red rhombohedral crystals from the Sweet Home Mine near Alma.
Amazonite
Amazonite
A vivid blue-green variety of feldspar, often found with smoky quartz in the granite pegmatites of Pikes Peak — a classic Colorado pairing.
Smoky Quartz
Smoky quartz
A brown-to-near-black variety of quartz with the usual six-sided crystals, commonly grown alongside amazonite in Pikes Peak pegmatites.
Topaz
Topaz
A hard, glassy gem mineral in colorless, blue, or sherry tones, forming stubby crystals in cavities of the Tarryall and Devils Head pegmatites.
Aquamarine
Beryl
The sky-blue gem variety of beryl, famously collected high on Mount Antero and White Mountain — one of the highest-elevation gem localities in the country.
Gold
Gold
The metal that sparked Colorado's mining boom — soft, heavy, and buttery-yellow, found as flakes and nuggets in streams and in veins in the mountains.
Seasonal Guide
- Summer is the practical season — many high pegmatite sites are snowbound much of the year.
- At altitude, pace yourself, carry water, and watch the weather for afternoon storms.
- A gold pan works the gravels of historic districts; check current rules and claims before digging.
Safety Reminder
This is an identification guide only. Respect mining claims and private property, follow the rules on public land, and never enter abandoned mine workings — they are extremely dangerous. Watch for altitude, weather, and unstable ground in the high country.
Identify it instantly
Found something and not sure what it is? Point your camera with Spotter and get a species identification in seconds — with detailed reference info and species notes.