Research Article Search Results
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.
Gersdorffite in Quartz
Gersdorffite inclusions in quartz exhibit either triangular or hexagonal shapes when viewed from different directions.
Cristobalite Stars and Snowflakes in Devitrified Glass
A unique inclusion scene caused by devitrification is observed in artificial glass.
Type IIa/IaB Diamond Showing Transient Type IIb Responses
A 2.50 ct natural type IIa/IaB diamond submitted to the Dubai laboratory shifts to type IIb after deep-UV excitation.
Extraordinary Large Bicolor Natural Rough Diamond
A 37.41 ct natural rough diamond with distinct pink and colorless zones is examined at GIA’s Botswana laboratory.
Low-Heft Hollow Natural Pearl with an Opening
Organic-rich material is observed through an opening in a hollow natural pearl.
Pink Diamond with Mottled Appearance
Examination of a Fancy Deep brownish orangy pink diamond reveals evidence of treatment to enhance its color.
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.
