Colored Stones and Organic Materials Alaskan Amber Update on Iridescent Andradite from Mexico Two Unusual Star Emeralds Faceted Blue Euclase from Colombia Color-Change Fluorite Herderite from Pakistan Jeremejevite from Myanmar and Sri Lanka Pink Opal from Monte Rosa, Peru Update on Prehnite from Australia Prehnite from Mali Natural Sapphire with Unusual Inclusions Sillimanite from India Resembling Moonstone Sphene from Afghanistan Uvite-Dravite Tourmaline from Morogoro, Tanzania Triploidite from China Väyrynenite from Afghanistan Synthetics and Simulants Diffusion-Treated Synthetic Sapphire Treatments Lead Glass–Filled Ruby Bead Necklace Announcements AGTA Spectrum Awards Competition NAJA Conference Scholarship Exhibits Upcoming GIA Museum Exhibits King Tut Returns To view the full section, download the PDF above.
Colored Stones and Organic Materials Alaskan Amber Update on Iridescent Andradite from Mexico Two Unusual Star Emeralds Faceted Blue Euclase from Colombia Color-Change Fluorite Herderite from Pakistan Jeremejevite from Myanmar and Sri Lanka Pink Opal from Monte Rosa, Peru Update on Prehnite from Australia Prehnite from Mali Natural Sapphire with Unusual Inclusions Sillimanite from India Resembling Moonstone Sphene from Afghanistan Uvite-Dravite Tourmaline from Morogoro, Tanzania Triploidite from China Väyrynenite from Afghanistan Synthetics and Simulants Diffusion-Treated Synthetic Sapphire Treatments Lead Glass–Filled Ruby Bead Necklace Announcements AGTA Spectrum Awards Competition NAJA Conference Scholarship Exhibits Upcoming GIA Museum Exhibits King Tut Returns To view the full section, download the PDF above.
