FEATURED ARTICLE

Curved Tubes in Blue Sapphire

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by Victoria Raynaud, Wim Vertriest, and Vincent Pardieu

During a GIA field expedition to Vietnam in May 2016, a 0.45 ct faceted blue sapphire containing numerous hair-like curved tubes was discovered at the gem market in Yen The. While the seller said the stone was mined in the Luc Yen area, this could not be confirmed…

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