Research Article Search Results
Diamond Slices
Crimson Prince Ruby from Namya
Baroque Pearls
Synthetic Sapphire with Diffusion-Induced Color and Star
Diffusion treatment is used to induce color and asterism in a colorless synthetic sapphire.
Fluorite Sphere with Phosphorescent Coating
Nonbead-Cultured Pearls from Strombus Gigas
Advances in pearl culturing are seen in a parcel of specimens from Strombus gigas gastropods.
Near-Colorless Melee-Sized HPHT Synthetic Diamonds Identified in GIA Laboratory
The Bangkok lab examines near-colorless HPHT synthetic diamonds in melee sizes.
Unusual Combination of Inclusions in Synthetic Star Sapphire
A hexagonal boundary, usually found in natural material, is observed in a synthetic star sapphire.
Large Cat’s-Eye Emerald from Brazil
A translucent Brazilian emerald exhibiting pronounced chatoyancy is examined.
Romancing the Source: Afghanistan
Accompany GIA field gemologists on a true gemstone mining adventure to the emerald mines in the Panjshir Valley of Afghanistan, whose rugged inhabitants have held off 10 Soviet invasion attempts. See how emeralds are mined in a mountain source that few have witnessed.
Analysis of Synthetic Ruby Overgrowth on Corundum
Analysis of synthetic ruby overgrowth on corundum, using analysis of inclusions, UV-Vis-NIR and EDXRF spectroscopy, and LA-ICP-MS.
Romancing the Source: Sri Lanka
Accompany GIA field gemologists on a true gemstone mining adventure in Sri Lanka, “The Island of Jewels.” You’ll observe traditional gemstone mining techniques that are still in use today. Sri Lanka is a mining, cutting, and trading powerhouse.
