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Fireworks in Ruby
“Boomerang” Inclusion in a Rough Topaz
Carbon Dioxide in a Brown Diamond
Suspended Crystal in Red Spinel
New Production of Sapphire from Matepwende, Tanzania
Unusual Patterns in Diamonds Composed of Dark Micro-Inclusions
Multilayered Laboratory-Grown Diamond
Unique Moiré-Pattern Metallic Inclusion in Paraíba Tourmaline
X-ray Computed Microtomography: Distinguishing Natural Pearls from Beaded and Non-Beaded Cultured Pearls
The distinction of natural from cultured pearls traditionally has been based on X-radiography.
Paraíba-Like Synthetic Sapphire
Two flame-fusion synthetic sapphires with a Paraíba-like color are examined at GIA’s Carlsbad lab.
Emeralds from the Fazenda Bonfim Region, Rio Grande do Norte, Brazil
In 2006, emeralds were discovered in the Fazenda Bonfim region of northeastern Brazil.
