Staurolite in Ruby
Gems & Gemology at Ninety: Consistency and Change
Unusual Pink Sapphire Bead
Bicolor Double-Eye Tourmaline
Faceting Large Gemstones
Curves and Optics in Nontraditional Gemstone Cutting
Dumortierite-Quartz Rock Presented as Sapphire
The Gem Testing Laboratory of Jaipur, India, received for identification an opaque blue specimen, submitted as sapphire.
Burmese Jade: The Inscrutable Gem
Introduction to the Micro-World of Gems
Beyond Beauty: A Garnet Necklace Decoded
Colored Stones and Pearls | Gems & Gemology
The 3309 cm–1 Series in Sapphire and Ruby: A Focus on FTIR Peak Position Variation
Investigates the correlations between peak positions in the 3309 cm–1 series with trace element concentrations for ruby, metamorphic and basalt-related blue sapphire, and laboratory-grown sapphire.
Precious Opal from Pedro II, Brazil
Unique Sphalerite from Spain
Thirty Years Later: “The Royal Tapestry” Revisited
Ukrainian Pegmatitic Heliodor and Topaz
Unusual Aquamarine–White Beryl
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