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Category: Colored Gemstones

Sapphire necklace by Bulgari (5) 1280 used 032123

Necklace with 118ct. Sapphire Could Fetch $4.5M

Rare jewel will go under hammer at Phillips Hong Kong in May.
Gübelin Gem Lab stone collection

Gübelin Taps AI for Gemstone-Source Proof  

Gemtelligence analyzes emeralds, sapphires and rubies to determine origins and detect treatments.
(From left) Sebnem Duzgun, Nicole Smith, John W. Ford Sr., Kimberly Collins and Jenna White.

New Initiative Tackles Colored-Gemstone Traceability

AGTA partners with Colorado School of Mines to bring transparency to African gem operations.
GIA G&G 126ct emerald

GIA Examines Rare 126ct. Cat’s-Eye Emerald

Gem, likely from Brazil, is one of the largest the lab has graded.
Sapphire engagement ring credit Shutterstock used 013123

AGTA, Rio Grande Announce Collaboration

Organizations will promote each other’s businesses and activities.
Rough rubies from the Montepuez mine. (Gemfields)

Gemfields’ 2022 Ruby Auctions Set Company Record

Revenue up 13% year on year despite insurgency at Mozambique mine.

For Love of Lapis Lazuli

This deep-blue stone has been gracing sculptures, mosaics, paintings and personal adornments for millennia.
Gubelin Provenance Proof Marketplace

Gübelin Launches Online Marketplace for Traceable Gems

Provenance Proof spin-off allows buyers and sellers to trade responsibly sourced stones.
The Kafubu Cluster. (Gemfields)

Gemfields to Auction 187,775ct. Emerald Cluster

Miner believes it will achieve the highest price for a single emerald piece the company has ever sold, it said.
Rough rubies from the Montepuez mine. (Gemfields)

Gemfields Profit Jumps in Post-Pandemic Rebound

Colored-stone miner returned to normal auction schedule in first half of 2022.

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