Iridescent Inclusion in Tanzanite
A tanzanite displayed crystallographically aligned, vividly iridescent colors resulting from fine separations along the stone’s cleavage planes.
Shrinkage “Footprint” in Rose Quartz
A debris pattern within a rose quartz’s fracture resembles a dinosaur’s footprint.
Quarterly Crystal: Triplite in Topaz
The first triplite inclusion in a topaz host is examined.
Molybdenite in Topaz
An unusual host-inclusion association is revealed when cluster of crystals in a colorless topaz is discovered to be molybdenite.
Large Aqueous Primary Fluid Inclusion in Amethyst
A strikingly large primary fluid inclusion with a gas bubble was seen in a Moroccan amethyst.
Solution-Generated Pink Color Surrounding Growth Tubes and Cracks in Blue to Blue-Green Copper-Bearing Tourmalines from Mozambique
Several transparent, faceted, blue to blue-green copper-bearing tourmalines containing growth tubes and cracks surrounded by sleeves of pink color were examined for this report.
Inclusions in Burmese Amber
Examples of Burmese amber specimens with well-preserved inclusions that have become available in recent years.
Composite Amber with an Unusual Structure
This 9.12 gram amber composite featured a combination of natural and imitation amber, accompanied by natural and artificial insect inclusions.
Chart: Inclusions in Natural, Synthetic, and Treated Diamond
Provides a visual guide to the internal features of natural, synthetic, and treated diamonds.
Sapphires from Australia
An overview of Australia's recent significance in the production of blue sapphire.