How do you identify gemstones? Here we provide free information and reference material regarding how to identify gemstones. The Gemstones Section is sponsored by the International School of Gemology, and will be presented in three stages for most gems. First for Consumer Information to answer some of the frequently asked questions about the various gemstones. Then General Information for anyone wanting to know more technical information about the gemstone. And then the Gemological Information for gemologists is available through the International School of Gemology.