Note: We try to link to reputable sites, but a link should not be seen as an endorsement.
Gemstone & Mineral Info
- Mindat – World’s largest public database of mineral information.
- Minerals.net – Information on major minerals & gemstones.
- Geology.com – General information on most mineral topics.
- Gemological Institute of America – The leading (nonprofit) gemological research institute.
- Gemval – Professional guide to gemstone prices (requires a subscription for the prices of the most popular gemstones).