Category: Colored Gemstones

How the GIA Identifies Gem Origin

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

GemTalks: Inside GIA’s Colored Stone Reports

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

Gemfields’ Loss Narrows Even as Revenue Falls

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

Gemfields 2025 Auctions Disappoint Amid Challenging Market

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

Gemfields Reports High Interest in Fine-Quality Rubies at Auction

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

AGTA Debuts Innovative Design Award

Category will be a part of its annual Spectrum accolades.

IGI Acquires US Colored-Gemstone Lab

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

Podcast: Lobbying Washington on Tariffs

AGTA’s John Ford and Bruce Bridges share updates and insights.

Gemfields Auction Sees Emerald Prices Improve

Miner sells 3.4 million carats for $25.4 million in latest sale of commercial-quality goods.

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