Research Article Search Results
Enumerating Diamond Cuts
The Transformation of Diamond Cut Quality Grading: Where Are We Now?
New Edition of Tillander’s Diamond Cuts in Historic Jewellery 1381–1910
An updated edition of Herbert Tillander’s book is now available.
Filled Natural Hollow Heart-Shaped Pearls
Examination of four heart-shaped pearls reveals cavity filling and plugging to improve durability.
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.
An Unconventional Bead Cultured Saltwater Pearl
A semi-baroque saltwater nacreous pearl presents identification challenges in the Mumbai laboratory.
Assembled Black Imitation Pearl
An undrilled black bead is identified as an assembled imitation pearl made from shell fragments.
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.
Fracture-Filled Diamonds Detected in Mounted Jewelry
The Mumbai laboratory reports on a jewelry submission containing fracture-filled diamonds.
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.
