Phosphorescence in Synthetic Sapphire
Rare phosphorescence was observed in a synthetic sapphire, which had unusual properties not indicative of a particular growth method.
Corundum Carving Coated with Coloured Polymer
An opaque carving was identified as colour-coated corundum based on visual features, as RI and SG could not be measured because of the piece’s large size.
Unusual Dumbbell-Like Inclusion in Diamond
Examination of a 0.40 ct near-colourless round brilliant diamond with a large inclusion resembling a dumbbell