Research Article Search Results
Characterization of Emeralds from Zhen’an County in Shaanxi, China
Presents a comprehensive analysis of the gemological, spectroscopic, and trace element characteristics of a set of Shaanxi emerald samples based on standard and advanced gemological methods.
Filled Natural Hollow Heart-Shaped Pearls
Examination of four heart-shaped pearls reveals cavity filling and plugging to improve durability.
Blooming Bouquet: Thin Films in Russian Emerald
Colorful thin film inclusions are captured within a Russian emerald carving.
“Bamboo Forest” in Colombian Emerald
Dense tube inclusions in emerald create a scene reminiscent of a tranquil bamboo forest.
An Unconventional Bead Cultured Saltwater Pearl
A semi-baroque saltwater nacreous pearl presents identification challenges in the Mumbai laboratory.
Fracture-Filled Diamonds Detected in Mounted Jewelry
The Mumbai laboratory reports on a jewelry submission containing fracture-filled diamonds.
Assembled Black Imitation Pearl
An undrilled black bead is identified as an assembled imitation pearl made from shell fragments.
Dark Red Tantalite Crystal in Greenish Blue Sapphire
The blunt termination of a red manganotantalite inclusion displays a striking contrast against a greenish blue sapphire.
Fingerprint Pattern on a “Hammered” Pearl’s Surface
Spiral patterns of nacre platelets observed on the surface of a non-bead cultured pearl are reminiscent of fingerprints.
New Edition of Tillander’s Diamond Cuts in Historic Jewellery 1381–1910
An updated edition of Herbert Tillander’s book is now available.
The Primary Sapphire Occurrence at French Bar Sill Along the Missouri River, Near Helena, Montana
Reports on a new source of primary gem-quality sapphire from Montana, comparing its inclusions and trace element chemistry with those from secondary sources in the state.
