Research Article Search Results
Sea Urchin–Like 3D Radial Fissures in a Heated Mong Hsu Ruby
Examination of a 1.34 ct ruby reveals a unique inclusion formed during heat treatment.
Quarterly Crystal: Almandine-Pyrope Garnet in Diamond
A diamond octahedron from South Africa hosts a rare yellow-orange almandine-pyrope garnet crystal.
External Morphology and Internal Zonal Structure of Macle Diamond
Investigates the morphological changes of macle diamonds during the growth process by exploring their three-dimensional internal zonal structure.
Two Assembled Pearls
Natural pearl cores are used to simulate the appearance of natural pearl growth in two assembled pearls mounted in a pair of earrings.
Quench-Crackled and Dyed Laboratory-Grown Sapphire
The Carlsbad lab receives a laboratory-grown colorless sapphire with weblike fractures containing concentrations of dye.
Raw Brilliance: Nature’s Diamond Sculptures
Showcases the diverse natural shapes of rough diamonds and explores how geological processes create their unique forms.
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.
Diamond Ring Prize from an Arcade-Style Claw Game
A diamond ring from a claw game in Japan is analyzed.
Low-Heft Hollow Natural Pearl with an Opening
Organic-rich material is observed through an opening in a hollow natural pearl.
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.
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.
