The Art and Science of Identifying Gemstones
Gemology is both art and science. Learn how identifying gemstones combines traditional testing techniques, modern software, and deductive…
Ruby Buying Guide
Learn essential ruby buying tips from experts. Discover how to evaluate color, clarity, cut & carat weight. Avoid synthetic stones & treatments.…
The Collector’s Guide to the Minerals of New York State: Book Review
The Collector’s Guide to the Minerals of New York State is ideal for both experts and hobbyists. Its information, organization, and photos are…
Faceted Gemstones And Light Return Measurements
What factors determine the light return of faceted gemstones? Facet quality, polish, color, and cut style all play roles. Learn more about these…
Understanding Gem Synthetics, Treatments, And Imitations, Part 2: Crystal Growth
Learn about the different crystal growth methods used to artificially create gemstones in laboratories.
Understanding Gem Synthetics, Treatments, And Imitations, Part 4: Synthetic Gemstone Guide
Many varieties of gems besides diamond can be created in the laboratory. Our synthetic gemstone guide covers many examples and explains their…
Fancy Round Brilliant Cut Tourmaline, Mozambique, 1.15 cts
A deep green tourmaline that looks almost like a tsavorite garnet. It can also show some medium blue-green flashes from side angles.
Feldspar Value, Price, and Jewelry Information
Feldspars are the most common minerals at the Earth’s surface. In fact, if the entire composition of the Earth’s crust were regarded as a single…
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