Tsavorite Garnet and Mahenge Red Spinel (英语)
A discussion of the current demand for tsavorite and spinel in today’s market.
HPHT Synthetic Diamond Melee in High-Quality Jewelry Piece (英语)
The New York lab discovers a synthetic melee diamond in a pendant, underscoring the importance of testing for undisclosed synthetics.
Blue Spinel from the Luc Yen District of Vietnam (英语)
Offers geological context and gemological characterization of this increasingly popular vivid blue spinel from northeast Vietnam.
Amethyst From Morocco:An Update
GIA’s Bangkok lab investigates the gemological properties of Moroccan amethyst.
Gemstones and Jewelry Inspired By Nature
At AGTA, exquisite jewelry pieces inspired by natural scenes were on view.
New Production of Brazilian Emerald from Minas Gerais
Emerald from the Belmont and Montebello mines of Minas Gerais, Brazil seen at the GJX show in Tucson.
Dumortierite in Rock Crystal Quartz
Prismatic blue and colorless dumortierite inclusions in rock crystal quartz are examined for the first time in the Carlsbad lab.
Diamond in Diamond
A Fancy black round brilliant diamond has an inclusion that is revealed to be a natural diamond crystal.
Color-Change Garnets from Tanzania
Striking Tanzanian garnets showing color shifting at the Riverpark Inn (Pueblo) show in Tucson.