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Spring 2000 Gem News International

A compilation of gem news from around the world, covering topics such as localities, unusual gem materials, market news, new products, discoveries, jewelry manufacturing techniques, and industry trends.

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Rough and cut sapphires
Article
A Study of Sapphire from Chanthaburi, Thailand and its Gemological Characteristics

A report from the GIA Laboratory in Bangkok presents their findings on 59 blue sapphire samples obtained from a miner in the Khao Ploy Waen area, Chanthaburi.

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Blue sapphires
Article
An In-Depth Gemological Study of Blue Sapphires from Pailin, Cambodia

A report from GIA Laboratory in Bangkok analyzing 68 blue sapphires from Pailin, Cambodia.

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Synthetic ruby overgrowth on natural sapphire seed.
Two Unusual Natural Sapphires with Synthetic Ruby Overgrowth

For the first time, the Carlsbad and New York labs see natural sapphire seeds with synthetic ruby overgrowth.

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The rough sapphire crystal as it was mined.
The “Montana Queen” Sapphire

A rough blue sapphire crystal from the Rock Creek deposit is heat treated and cut to become the largest known faceted blue Montana sapphire.

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Flux-grown pink synthetic sapphire with unusual inclusions.
Flux-Grown Pink Synthetic Sapphire with Unusual Crystal Inclusions

Gemological testing and advanced analyses of a pink stone reveal unexpected results.

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Sapphires from Antang and Gombe, Nigeria.
Yellow, Green, and Blue Sapphires Reportedly from Antang and Gombe, Nigeria

Nineteen sapphires of various colors, reportedly from sources in northern Nigeria, are studied in GIA’s Tokyo laboratory.

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Green synthetic sapphire with clouds of bubbles.
Unusual Inclusions in Green Synthetic Sapphire

A green step-cut synthetic specimen hosts inclusions that provide insight into its growth method.

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Sapphires from a variety of sources.
Inclusions in Natural, Synthetic, and Treated Sapphire

Provides a visual guide to the internal features of natural, synthetic, and treated emeralds.

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Sapphire with blue and white area and black inclusions.
Sapphires with Unusual Radial “Eye” Structure

Sapphires exhibiting radial structures are examined.

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