There are over 774 gems and mineral localities in Colorado. Here’s a list of key locations and the material that can be found (Source: Rocks and Minerals, July 2002) .
- Stoneham – Barite
- State Line Diamond District
- Red Feather Lakes – Amethyst
- Devils Head – Smoky Quartz, Clear White Quartz, Citrine and Topaz
- Wigham Creek – Topaz, Smoky Quartz, and Amazonite
- Crystal Park – Topaz, Smoky Quartz, and Amazonite
- Glen Cove – Topaz
- Crystal Peak – Amazonite, Topaz, Smoky Quartz and Clear White Quartz
- Tarryall Mountains – Topaz, Smoky Quartz and Clear White Quartz
- Cripple Creek – Turquoise
- Alma – Rhodochrosite (Colorado State Gem)
- Leadville – Turquoise
- Italian Mountain – Lapis Lazuli
- Buena Vista – Aquamarine, Phenakite, Rose Quartz
- Ruby Mountain – Garnet, Obsidian and Topaz
- Badger Creek – Peridot
- Villa Grove – Turquoise
- La Garita Crystal Hill Mine – Amethyst
- Del Norte – Plume Agate
- Manassa – Turquoise
- Creede – Amethyst, Sow Belly Agate, Silver
- Silverton Sunnyside Mine – Rhodonite (Pyromangite)
- Silverton Camp Bird Mine – Gold in Milky Quartz
- Whitewater – Amethyst
- Book Cliffs – Barite
Click here for a listing of known Colorado gem & mineral locations: http://www.peaktopeak.com/colorado/index.php3