Amber with Insect-Bearing Filling
Natural amber beads were found to have been filled with plastic and a variety of insects.
Boron Carbide: A New Imitation of Black Diamond
The Gem Testing Laboratory in Jaipur identified a black diamond-like specimen as boron carbide, a ceramic material typically used in nuclear, military, and aerospace applications.
Unusual Epigenetic Malachite Discs in Quartz
The uncommon occurrence of epigenetic malachite, as found in this quartz, can result in vivid green color.
Water Immersion Reveals Dye in Fire Opal
A simple test easily detected dye treatment in fire opal.
Corundum Carving Coated with Colored Polymer
An opaque carving was identified as color-coated corundum based on visual features, as RI and SG could not be measured because of the piece’s large size.
Unusual Faceted Massive Fuchsite
An unusually large faceted fuchsite, the chromian variety of muscovite, was identified and its green color explained.
Phosphorescence in Synthetic Sapphire
Rare phosphorescence was observed in a synthetic sapphire, which had unusual properties not indicative of a particular growth method.