https://www.gia.edu/gems-gemology/WN13-Long-Gemstone-Mining-Vietnam
Update on Gemstone Mining in Luc Yen, Vietnam | Gems & Gemology
Explores the emergence of the Luc Yen area as a producer of corundum, spinel, tourmaline, and other colored stones.
gemstone miningluc yenupdatevietnamgemology
https://www.gia.edu/CN/gems-gemology/spring-2015-blue-spinel-luc-yen-district-vietnam
Blue Spinel from the Luc Yen District of Vietnam | Gems & Gemology
Offers geological context and gemological characterization of this increasingly popular vivid blue spinel from northeast Vietnam.
luc yen districtblue spinelfrom the