Category: Colored Gemstones

GIA and Swiss Lab Confirm New Tourmaline Originates from Ethiopia

Testing shows gems are copper-bearing Paraiba, with a color variation stemming from different chemical composition.

Recognized trade names such as “pigeon blood” and “royal blue” will now be included in description.

Nicole Ahline, supervisor for colored stones, shares her knowledge.

Nicole Ahline will explain how the lab identifies treatment status and origin.

Miner sells 36 of 37 lots for total of $26.8 million.

Reopening of Kagem emerald mine and cost-saving measures partially offset deficit.

Demand uneven, skewing away from lower-quality, smaller goods.

90% of lots found buyers in latest sale, averaging $279 per carat.

Category will be a part of its annual Spectrum accolades.

Headquartered in New York, American Gemological Laboratories carries out analysis and provenance reporting.

The September issue looks at the spending trends, gemstones, and styles shaping retail shopping this festive season.