Blue Color in Quartz Caused by Elbaite Inclusions
Blue needle-like inclusions are analyzed in three quartz spheres.
Raw Brilliance: Nature’s Diamond Sculptures
Showcases the diverse natural shapes of rough diamonds and explores how geological processes create their unique forms.
Trapiche Pattern Formation of Grossular Garnets
GIA’s Tokyo laboratory examines three grossular garnets displaying six-rayed black inclusions arranged in a snowflake-like pattern.
Large Peridot from Myanmar with an Eight-Rayed Star
An eight-rayed star peridot with a star system made up of two different sets of inclusions is described for the first time.
Low-Temperature Heat Treatment of Corundum and the Behavior of the 3161 cm–1 Infrared Band
A study analyzing the thermal behavior of the 3161 cm–1 IR feature in 10 natural corundum samples from various deposits.
Unusual Yellow Diamond with a Complex Growth History
A combination of growth and dissolution features contribute to a yellow diamond’s unique shape.
Diamond Ring Prize from an Arcade-Style Claw Game
A diamond ring from a claw game in Japan is analyzed.
Gaseous Carbon Dioxide Phases in Paraíba Tourmaline
Immiscible two-phase fluid inclusions are investigated in a 0.48 ct Paraíba tourmaline.
Palaeoclavaria burmitis Inclusions in Burmese Amber
Fungal inclusions are studied in two specimens of Burmese amber.
A Guide to Diamonds with the 480 nm Absorption Band
Summarizes the features of 480 nm band diamonds, including chameleon diamonds and those with unmodified orange hues, for rapid identification or advanced gemological testing.
Low-Heft Hollow Natural Pearl with an Opening
Organic-rich material is observed through an opening in a hollow natural pearl.
Gersdorffite in Quartz
Gersdorffite inclusions in quartz exhibit either triangular or hexagonal shapes when viewed from different directions.
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