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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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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 the Baw Mar Mine (Mogok, Myanmar)

GIA field gemologists visited Baw Mar operations in 2013, 2014, and 2015. In this study, we analyzed samples collected during two separate expeditions.

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Sapphire
Article
Sapphires from the Gem Rush Bemainty area, Ambatondrazaka (Madagascar)

The discovery of many fine quality sapphires in this area is opening a new chapter in the conflict between conservation and gem mining in northeastern Madagascar.

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Blue Sapphire
Article
New Nigerian Source of Blue Sapphire

A preliminary report on blue sapphires from a new deposit in Nigeria's Mambilla Plateau.

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