GIA Board of Governors Welcomes Two New Members
At its recent meeting in Carlsbad, California, the Board of Governors of the Gemological Institute of America, Inc. (GIA) announced the addition of two new members, Lisa Bridge, President and CEO of Ben Bridge Jeweler and Dr. Wendy Bohrson, professor of geology at the Colorado School of Mines.
以色列拉馬特甘 GIA 鑑定所停止營運
The GIA laboratory in Ramat Gan, Israel, will end operations by the end of 2024 due to changes in the global diamond industry that resulted in significant declines in submissions from local clients over the last several years.
GIA Laboratory in Ramat Gan, Israel, to End Operations
The GIA laboratory in Ramat Gan, Israel, will end operations by the end of 2024 due to changes in the global diamond industry that resulted in significant declines in submissions from local clients over the last several years.
Rare Musgravite Crystal in Green Sapphire
A surface-reaching crystal in a green sapphire is identified as musgravite.
“Out of the Darkness” …and Into the Light of Diamond Fluorescence
A unique art piece crafted with more than 9,200 diamonds is examined at GIA’s Carlsbad laboratory.
Ruby with Synthetic Overgrowth Lining Cavities
An unusual area of granular texture lining the cavity of a ruby indicates synthetic overgrowth.
Master Diamond Cutter Harvey Lieberman
A look at Harvey Liberman’s career as a renowned diamond cutter in New York’s Diamond District.
Hedenbergite in Quartz
Examination of polished quartz samples reveals crystal inclusions identified as hedenbergite and sphalerite.
Iridescent Tubes in Pezzottaite
A large purplish pink pezzottaite with growth banding and tube inclusions is examined in the Carlsbad laboratory.
New Production of Sapphire from Matepwende, Tanzania
Reports on the study of sapphire samples from a newly discovered source in southern Tanzania.
A Multicore Non-Bead Cultured Pearl
A non-bead cultured pearl with six cores is discovered in a large lot of pearls submitted to the Mumbai laboratory.
Mineral Assemblage of “Paraíba Matrix”
The contents of two “Paraíba matrix” samples are analyzed.
Interesting Metallic Platelets in Morganite
Skeletal formations of metallic reflective thin films are observed in a pinkish orange morganite.
Helvine Inclusions in Morganite
An orangy pink morganite specimen from Madagascar contains hundreds of yellow helvine crystals aligned on a single plane.
Fireworks Display in Russian Emerald
The inclusion scene in a Russian emerald resembles fireworks illuminating a night sky.
Almandine Garnet from Phu Tho, Vietnam
Reports on the study of garnet samples from a source in northern Vietnam.
Irradiated HPHT-Grown Diamonds with Blue-Green Color Zonation
The Carlsbad laboratory reports on two HPHT-grown diamonds with interesting sector-dependent color zonation.
Zoned Trapiche Emerald with Goshenite Overgrowth
A 12.62 ct trapiche emerald with areas of goshenite is analyzed in GIA’s Tokyo laboratory.
Arzakite Inclusion in Ruby from Mogok
A report on the first documented arzakite inclusion in a Mogok ruby.
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