The Foldscope and Its Gemological Applications
The author tests the suitability of a portable paper microscope, called the Foldscope, for gemological application.
Unusual Dumbbell-Like Inclusion in Diamond
Examination of a 0.40 ct near-colorless round brilliant diamond with a large inclusion resembling a dumbbell
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.
Phosphorescence in Synthetic Sapphire
Rare phosphorescence was observed in a synthetic sapphire, which had unusual properties not indicative of a particular growth method.