Here are some useful sites related to gems and minerals that we recommend for more information.
Since 1934, the American Gem Society (AGS) has played a prominent role in creating industry standards and promoting laws and regulations that protect the jewelry buying public. To reinforce this effort, the AGS requires members to comply with the most stringent criteria for ethical business practices – the ultimate in consumer protection.

Amethyst describes over 600 mineral species (and varieties) and more than 5000 specimens, together with several ways of accessing these descriptions. The descriptions include searchable mineralogical data, plus other information of interest to students and rock hounds. was the first rock shop on the Internet, going live (with a numeric IP) in the fall of 1994, and under the domain in the spring of 1995.
Canadian Gemmological Association (CGA) is Canada's professional organization for the practice of gemmology. This website contains information about the organization, including information on membership, products, meeting times, annual Gem Conferences and more.
Established in 1931, the Gemmological Institute of America (GIA) is the world’s largest and most respected nonprofit institute of gemological research and learning. Conceived 72 years ago in the august tradition of Europe’s most venerated institutes, GIA discovers (through GIA Research), imparts (through GIA Education), and applies (through the GIA Gem Laboratory and GIA Gem Instruments) gemological knowledge to ensure the public trust in gems and jewelry.
The International Colored Gemstone Association (ICA) is a non-profit association which was founded in 1983 to represent the international gemstone industry. The ICA is the first and only organization working to increase the understanding, appreciation, and sales of colored gemstones worldwide. is the largest mineral database and mineralogical reference website on the internet. This site contains worldwide data on minerals, mineral localities and other mineralogical information.
The Mineralogical Society of America (MSA) was founded in 1919 for the advancement of mineralogy, crystallography, geochemistry, and petrology, and promotion of their uses in other sciences, industry, and the arts.
The RRUFF™ Project is an integrated study of the chemistry, crystallography, Raman and infrared spectroscopy of minerals. The RRUFF™ Project is creating a complete set of high quality spectral data from well characterized minerals and is developing the technology to share this information with the world. The collected data provides a standard for mineralogists, geoscientists, gemologists and the general public for the identification of minerals both on earth and for planetary exploration.
WebElements is a high quality source of chemistry information on the WWW relating to the periodic table. Coverage is such that professional scientists and students at school interested in chemistry and other sciences will all find something useful.
The site contains mineral data on individual species that are linked to mineral tables by crystallography, X-Ray powder diffraction, chemical composition, physical and optical properties, Dana's New classification, Strunz classification, mineral specimen images, and alphabetical listings of mineral species. There are extensive links to other sources of mineral data and information.

HERE for other Mineral Information Links.

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