- Blue Amber
- Highlights information about blue amber; its origin, fossils and products catalog.
- Caribbean Gemological Institute
- Includes diamond and gemstone information, travel and sopping tips, watches and gold jewelry guide. Plus appraisal details.
- Gem Hut
- Features a collection of natural gemstones from around the world.
- Gem Identification Bluechart
- Highlights a practical gem identification chart with special emphasis on treated, synthetic and imitation gemstones. Ordering details included.
- Gemology Tools
- Provides gemology software for jewelry appraisals and the Gemstone Database, featuring the Gem Separator for easy gem identification.
- Gems and Gem Materials
- UC Berkeley Department of Earth and Planetary Science student resource to jelwelry, gem images and course materials.
- Geo347K Gem Notes
- Compilation of information on the most popular gems as covered in classroom lectures.
- GeoNord
- Presenting details for mineral hunting, elements, historical geology, research and education.
- Guides for the Jewelry, Precious Metals, and Pewter Industries
- Applies to jewelry industry products, related articles, and persons engaged in the business of offering for sale and distribution.
- How to Collect Gems for Fun and Profit
- Provides a list of sought-after gems, background information, and tips on earning from selling gems.
- The Image
- Compilation of a wide range of mineral and gemstone gallery. comes with faceting details and geology 101 notes.
- Jewels
- Photo collection of precious and semi-precious gems, with descriptions, chemical composition, and sample dimensions.
- PrettyRock.com
- Offers gemological instruments, facet rough, and gem cutting equipment. Also provides an online forum, many free tutorials and gemological instructions to the gemology and lapidary community.
- Secrets Of The Gem Trade
- Information about the author and his book; with connoisseur's guide to precious gemstones.
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