Fissure with Moiré Pattern in Spinel
A precipitation of an unidentified mineral creates a complex moiré pattern in a fissure of a purple spinel.
Zigzag Fingerprint in Sri Lankan Sapphire
Fiber-optic illumination reveals rectilinear zigzag-patterned films with vibrant colors in a blue sapphire.
Rainy Lakeside City in Peridot
Blade-like magnetite inclusions developed from a healed fracture in peridot resemble a dark, rainy afternoon in a lakeside city.
Heliodor with a Large Schorl Inclusion
An 8.33 ct rectangular heliodor displays two tourmaline inclusions and a thin band of fluids.
Solid Laboratory-Grown Single-Crystal Diamond Ring
The quality and size of this 4.04 ct CVD-grown diamond ring demonstrate the advancing technology in laboratory-grown diamonds.
A Red Herring in a Red Garnet
Transparent crystal inclusions and gas bubbles are observed in a garnet-topped doublet.
Blackish Green Omphacite Jade from Guatemala
A Guatemalan jade called yongchuliao has gained popularity among Chinese buyers.
Aquamarine with Zigzag Growth Line Inclusions
Zigzag lines are observed only with oblique light in a 55 ct aquamarine.
Inclusion Resembling a Gada in Diamond
An etch channel in the crown facets of a diamond resembles a mace-like weapon.
Etch Features Reveal the Morphology of Diamond
Trigons and tetragons observed in a chameleon diamond indicate both octahedral and cubic growth.
Eclogite: Diamond-Encrusted Ancient Seafloor
Explores eclogitic diamonds, which make up a significant portion of the gem diamond market, and what they reveal about Earth’s dynamic processes.
Iolite from the Thor-Odin Dome, British Columbia, Canada: Geology, Chemical Composition, Inclusions, and Cause of Chatoyancy
Reports on the geological setting and gemological properties of violet-blue gem cordierite from new deposits located in British Columbia.
Yellow Sapphire: Natural, Heat-Treated, Beryllium-Diffused, and Synthetic
Investigates the various chromophores responsible for color in four types of yellow sapphire.
Etch Pits in Heliodor and Green Beryl from the Volyn Pegmatites, Northwest Ukraine: A Diagnostic Feature
Examines dissolution features of heliodor and green beryl from a Ukrainian pegmatite field and offers criteria to distinguish them from samples found in other localities.
Special Colors and Optical Effects of Oregon Sunstone: Absorption, Scattering, Pleochroism, and Color Zoning
Details the colors and optical effects caused by metallic copper inclusions in this gem-quality feldspar.
Cause of Color in Yellow Sapphire, Plus Characterization of Oregon Sunstone, Ukrainian Beryl, and British Columbian Iolite
An overview of the Fall 2023 Gems & Gemology content.
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GIA招聘会10月6日在加州卡尔斯巴德举行
宝石学研究、教育和鉴定所服务的先导权威GIA美国宝石研究院，将于10月6日星期五在加州卡尔斯巴德的全球总部主办Powered by GIA招聘会，带来非凡体验并提供就业指导，参加者可深入交流，互相启发，并有机会与行业内知名企业的招聘人员会面，拓阔人脉圈子。
GIA招聘会10月6日在加州卡尔斯巴德举行
宝石学研究、教育和鉴定所服务的先导权威GIA美国宝石研究院，将于10月6日星期五在加州卡尔斯巴德的全球总部主办Powered by GIA招聘会，带来非凡体验并提供就业指导，参加者可深入交流，互相启发，并有机会与行业内知名企业的招聘人员会面，拓阔人脉圈子。
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