GIA美国宝石研究院将引入一项报告注释，在Akoya养殖珍珠的指定质量范围加入珍珠行业常用且历史悠久的词汇「花珠」（Hanadama）。

Large near colorless, blue, and yellow diamonds broke auction records at Christie’s and Sotheby’s in the first half of 2022.

Both asterism and chatoyancy are observed in a color-change sapphire.

The quality and size of this 4.04 ct CVD-grown diamond ring demonstrate the advancing technology in laboratory-grown diamonds.

GIA president and CEO Susan Jacques receives the American Gem Society’s highest honor.

An intriguing metallic inclusion is observed in a faceted garnet.

The Nineteenth Annual Sinkankas symposium, held at GIA’s Carlsbad, California campus, focused on gems and minerals of San Diego County.

Microscopic observation unveils the first known instance of skeletal metallic inclusions in Brazilian Paraíba tourmaline.

Pinkish orange crystal inclusions in a faceted quartz are identified as the rare phosphate mineral triplite.

Isolated nitrogen confined to the outer surface of a 0.98 ct diamond causes “yellow skin.”

Fiber-optic light creates a night sky scene in a yellow sapphire from Madagascar.

Unusual natural pink diamonds displaying faint yellow color zoning and strong yellow fluorescence are studied in the Carlsbad laboratory.

A newly developed treatment creates a phantom structure in opal visually similar to natural phantom opal.

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An exceptionally large South Sea bead cultured pearl is examined at GIA’s Mumbai laboratory.

An iridescent feather inclusion in natural diamond bears resemblance to Rainbow Mountain in Peru.

A feather inclusion with iridescence caused by thin-film interference in diamond resembles an insect wing.