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Sapphire
The name “sapphire” can also apply to any corundum that’s not ruby red, another corundum variety.
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Ethical and Sustainable Vertical Integration in the Sapphire Market
The recession of 2008 transforms a gem business into a vertically integrated operation.
New Designs from Paula Crevoshay
World-renowned jewelry artist Paula Crevoshay displays some of her newest pieces at the Tucson gem shows.
Tourmaline and Sapphire from Nigeria
An update on Nigerian colored stone production is obtained at the Tucson gem shows.
Multi-Elemental Diffused and Melt-Grown Synthetic Sapphire
GIA examines a multi-elemental diffused and melt-grown synthetic sapphire for the first time.
Pink Sapphire Filled with Bismuth-Based Glass
A sapphire with a color not commonly seen in the lab is found to have a glass filling.
Magnificent Sapphires from Montana’s Rock Creek Mine
A look at the 2016 sapphire production from Montana’s Rock Creek deposit.
Negative Crystals in Sapphires
Sapphires from Baw Mar host multiphase inclusions in appealing patterns.
The Role of Silicon in the Color of Gem Corundum
Considers the previously unreported but critical impact of silicon on the coloration of gem-quality sapphire.
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.
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.
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.
Synthetic Sapphire and Synthetic Spinel Doublets
Unusual doublets created from two different synthetics are revealed at the Carlsbad laboratory.
