Testing of natural-color yellow sapphires from Australia and Thailand with the FTIR features of “Punsiri” heat-treated material.

Reports on exceptionally rare trapiche-patterned rhodochrosite from the famed Capillitas mine in Argentina.

Reports on the internal features and spectroscopic and trace-element analysis of rubies reportedly from Pokot, Kenya.

Analysis of attractive purple garnets from a new deposit in central Mozambique.

Reports on an expedition to many known and new Tanzanian gem localities.

A strikingly large primary fluid inclusion with a gas bubble was seen in a Moroccan amethyst.

Examination of aquamarine samples from a new primary deposit in San Luis Potosí, northern Mexico.