Etch Marks, Negative Crystals, and Etch Tubes in Spinel from Madagascar

FEATURED ARTICLE Etch Marks, Negative Crystals, and Etch Tubes in Spinel from Madagascar ___________________________ [...]

By | May 31st, 2017|Categories: LAB NOTE|Tags: |

[Video] Hunting for spinels in Vietnam

With this new short GIA field expedition video you will discover some aspects of the GIA Field Expedition FE65 that took place in May 2015 to the Luc Yen gem mining area in Northern Vietnam in order to collect some reference samples to be added to the GIA reference collection. This short video will focus on spinel mining with some very unique images of spinel mining in Cung Troi cliff near An Phu. Enjoy!

By | August 20th, 2016|Categories: FIELD REPORT, HIGHLIGHT|Tags: , |

[Video] Field Expedition FE62 to Mogok, Myanmar (Burma)

That GIA expedition took us to different mines and markets all around Mogok. One of the highlight of that expedition was the visit of a 300 meters deep underground operation in the Kadoke Tad area, where we could witness ruby mining.

By | June 24th, 2015|Categories: FIELD REPORT|Tags: , , , |

Cobalt diffusion of natural spinel

FEATURED ARTICLE cobalt diffusion of natural spinel: a report describing a new treatment on the gem [...]

By | June 4th, 2015|Categories: HIGHLIGHT, RESEARCH|Tags: , |