A Non-Nacreous Pearl Reportedly from Telescopium telescopium
An examination of the first natural pearl reportedly discovered in a Telescopium species.
Treated “Nickel-Rich” Green Diamond
Examination of a Fancy yellow-green diamond attributes color to both natural and artificial mechanisms.
Treated Orange and Pink CVD Laboratory-Grown Diamond
The Carlsbad laboratory reports on two CVD-grown diamonds subjected to multiple treatments to achieve their final color grades.
Large Orange Rutile Inclusion in a “Chameleon” Diamond
A partially enclosed orange rutile crystal is observed on the crown of a faceted diamond.
Quarterly Crystal: Panasqueira Quartz
Numerous inclusions are observed in a parallel cluster of two quartz crystals from Minas de Panasqueira in Portugal.
Small “Surprise” in Elbaite Tourmaline
Diopside crystals observed in elbaite tourmaline resemble an exclamation point.
“Smoke Rings” in a Non-Beryllium-Diffused Sapphire
A rare look at a smoke ring pattern identified in sapphire without the presence of beryllium.
Stellate Zircon in a Paraíba Tourmaline
Fiber-optic light reveals a remarkable set of stellate inclusions in blue-green Paraíba tourmaline.
Ahmadjan Abduriyim Receives JAMS Award for Applied Mineralogy
Ahmadjan Abduriyim receives 2021 JAMS award for his contributions to applied mineralogy.
Atypical “Box Bead” Cultured Pearls
GIA’s Bangkok laboratory examines five “box bead” cultured pearls with nuclei fashioned from saltwater shell.
Letters: More on Orange Luminescence in Corundum
Additional scientific details are provided to better understand orange luminescence in sapphire.
Exceptional Natural-Color Fancy Red Diamond
An extremely rare natural-color red diamond is submitted to the Carlsbad laboratory.
Gota de Aceite–Like Effect in a Brazilian Emerald
GIA’s Tokyo laboratory examines a Brazilian emerald with a gota de aceite–like effect characteristic of Colombian emeralds.
Rare Kashmir Star Sapphire
A stunning large Kashmir star sapphire, set in a combination ring and pendant, is submitted to the New York laboratory.
A Synthetic Moissanite Presented as Natural Diamond Rough
The New York laboratory identifies a sample submitted for a colored diamond identification and origin report as synthetic moissanite.