Yogo Mine in Montana, which produces the popular Yogo sapphires, was dormant for nearly four decades.
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![World Gem Foundation founder Geoff Dominy recently gave a lecture about valuing colored gemstones at the Addis Ababa Science and Technology University in Ethiopia. 20221221_WGF-header.jpg](https://uploads.nationaljeweler.com/uploads/e5f0c67ac88a7c98d71a06539bde0de8.jpg)
In a Q&A, founder Geoff Dominy shares WGF’s plans for training a generation of gemologists in gem-producing countries in Africa.
![20221219_In-Memoriam-header.jpg](https://uploads.nationaljeweler.com/uploads/28e0c35d7362113bb5552f8c2f0a5a0d.jpg)
From beloved designers and retailers to gem dealers with decades of experience, National Jeweler looks back on those individuals we lost this year.
![A 3.54-carat padparadscha sapphire submitted to the GIA laboratory underwent a color stability test, during which time its orange color increased. If left in the dark for a while, the color could become less orange or straight pink, GIA said. The lab said this stone would be called a padparadscha sapphire because the pink-orange color seen after the stability test (far right) fits that range. (Photo credit: Diego Sanchez) 20221214_GIA-sapphires.jpg](https://uploads.nationaljeweler.com/uploads/96ea11fad1f4633b5c09ff4642dd1f5a.jpg)
Some sapphires gain orange or yellow coloration when exposed to incandescent light, according to a recent lab note.
![This 13-carat pink diamond was withdrawn from a recent jewelry auction at Christie’s, and though no reason was given at the time, reports have emerged that it allegedly was stolen. 20221213_Pink-diamond.jpg](https://uploads.nationaljeweler.com/uploads/fc0bef5a68ff9c550a017016dcbae1cc.jpg)
It’s believed to be part of a $90 million scheme perpetrated by a man who billed himself as a psychic online.
Franklin police believe they could be connected to five other similar robberies.
![The jewelry in the collaboration between Muzo and NYC Jewelry Week’s Here We Are initiative will be sold at Greenwich St. Jewelers exclusively from now through Valentine’s Day 2023. 20221209_Muzo-NYCJW.jpg](https://uploads.nationaljeweler.com/uploads/ffc3c5c4c95878ee7c29566310f308f0.jpg)
They will be available exclusively at the retailer through Valentine’s Day 2023.
![2022-NAJA-logo.jpg](https://uploads.nationaljeweler.com/uploads/46190153efacf71b5eafcf075f98e881.jpg)
The 59th Ace It event is scheduled for Jan. 29 and 30 at the Tucson Convention Center.
![This 2.21-carat fancy intense blue diamond ring was one of the top lots in the Christie’s New York Magnificent Jewels auction held Dec. 6. 20221207_Christies-5.jpg](https://uploads.nationaljeweler.com/uploads/452ea5074cb95c075e56cdf016cd1b87.jpg)
After a 13-carat pink diamond was pulled ahead of the sale, blue and colorless diamonds reigned supreme.
![This gold ring featuring a gold-bearing quartz sold for $14,400 (compared with a $1,000 estimate) in Holabird Americana’s recent auction of treasures from the sunken S.S. Central America. 2022120622_SS-CentralAmerica-header.jpg](https://uploads.nationaljeweler.com/uploads/5f08b52c5c1ec796bb66ccd38814569b.jpg)
Holabird Western Americana Collections offered hundreds of treasures recovered from the S.S. Central America in its Dec. 3 sale.
![Princess Thyra of Demark’s tiara, which features five cabochon sapphires that can be exchanged for turquoise cabochons, sold for 650,000 DKK (or about $92,000 at current exchange rates) at auction Thursday. 20221202_Princess-tiara.jpg](https://uploads.nationaljeweler.com/uploads/a8d2c66c44096e9083e082020c7a05e8.jpg)
A princess’s tiara fell within its pre-sale estimate while an Art Deco bracelet from a queen doubled it.
![From now until Dec. 24, Nomad’s will sell one gem per day on its Instagram account to raise money for United24, the primary venue for collecting charitable donations in support of Ukraine. 20221201_Nomads.jpg](https://uploads.nationaljeweler.com/uploads/94356b0c88234cbed4e4773c07fc25bd.jpg)
In the spirit of an advent calendar, “Gems to Help Ukraine” will sell a stone a day through Dec. 24 on the Nomad’s Instagram account.
![PhotoScribe Technologies has secured a patent for its method of ensuring the correct identification of a stone using an overt mark, like a bar code, and a covert data set from the gem itself. 20221201_Photoscribe.jpg](https://uploads.nationaljeweler.com/uploads/b0e26c22044e20bcdde10f78666eb266.jpg)
The secure mark combines an overt mark with a covert data set to provide assurance on a gem.
![Watchfinder will launch a pre-owned luxury watch marketplace next year, inviting select retailers to sell their stock on the platform. 20221130_Watchfinder.jpg](https://uploads.nationaljeweler.com/uploads/663e93adfd5e683b4bdf435476ee241b.jpg)
It will provide a place for select luxury watch retailers to sell their stock.
![An aerial view of the Liqhobong Diamond Mine’s main pit 20221130_Liqhobong-aerial.jpg](https://uploads.nationaljeweler.com/uploads/c6f0a2d6dcacf2d25c97f13fc8089c49.jpg)
Liqhobong has been in a care-and-maintenance period since the start of the pandemic.
![Claire’s is opening shop-in-shops within 20 Macy’s stores across the U.S. 20221129_Claires-storefront.jpg](https://uploads.nationaljeweler.com/uploads/bf0778cdad945e01d0d8242a7b992a98.jpg)
The partnership brings Claire’s jewelry and accessories to 20 Macy’s locations in time for the holiday season.
![The Accredited Gemologists Association has made tickets available for its annual Tucson Gemological Conference and Gala. 20221128_AGA-Tucson.jpg](https://uploads.nationaljeweler.com/uploads/a067eb46dab1b6dca9d295a61d15c265.jpg)
Scheduled for Feb. 1, the event will feature six gemological education presentations and three hands-on sessions.
![Jewelry cleaner manufacturer The Kingswood Company is on Inc. magazine’s list of the 5000 fastest-growing private companies in the U.S. for the third year in a row. The company attributes its revenue growth in part to a move to a larger manufacturing and office space in 2021. 20221128_Kingswood-Inc.jpg](https://uploads.nationaljeweler.com/uploads/d984c249e33baded26d4063f8e0a7279.jpg)
The jewelry cleaner manufacturer jumped up to No. 3066 on the Inc. 5000 list.
![This sapphire and diamond tiara will be the highlight of the upcoming Jewellery and Handbags auction at Danish auction house Bruun Rasmussen. Once belonging to Princess Thyra of Denmark, it’s estimated to sell for between 600,000 and 800,000 DKK (about $83,000 to $111,000 at current exchange rates). 20221123_Tiara-header.jpg](https://uploads.nationaljeweler.com/uploads/5e7546ab92071431ca8352fa04f46ff1.jpg)
The Dec. 1 jewelry sale at Bonhams-owned Bruun Rasmussen will have several other pieces of royal jewelry on the block.
![A size 8.5 signet ring engraved with initials “SS” may have been owned by San Francisco jeweler Samuel Shreve, who was a passenger on the S.S. Central America when the ship sank in 1857 on a voyage to New York. (Photo credit: Holabird Western Americana Collections) 20221122_SS-CentralAmerica-header.jpg](https://uploads.nationaljeweler.com/uploads/47f7cbf82a2948c7cca52803879af1a2.jpg)
The S.S. Central America sank in 1857 off the coast of South Carolina, carrying tons of gold from the California Gold Rush.
![Provenance Proof has launched a B2B marketplace for gemstones and jewelry tracked on its blockchain platform. 20221121_Provenance-Proof-header.jpg](https://uploads.nationaljeweler.com/uploads/b04a24e5960b2263d0ce184e32abf0a7.jpg)
Debuting today, it is open to Provenance Proof blockchain users.
![Senior Editor, Gemstones Brecken Branstrator rounds up her favorite pieces from this year’s AGTA Spectrum Award entries, including this chrome tourmaline ring from Samuel Getz Designs. 20221118_Chrome-tourmaline-ring.jpg](https://uploads.nationaljeweler.com/uploads/91589a73a8fb24a40013158d0b1caa37.jpg)
Senior Editor Brecken Branstrator’s highlights include a chrome tourmaline ring, a giant opal necklace, and an American mined stone.
![This 7.42-carat light bluish-green synthetic moissanite, submitted as a diamond, displays triangular features on each of the octahedral faces. (Photo credit: Jian Xin (Jae) Liao.) 20221117_GIA-snyth-moissanite.jpg](https://uploads.nationaljeweler.com/uploads/f9111efbbc55077fb984b7b553cbc6ec.jpg)
The discoveries were outlined in the Lab Notes section of the fall 2022 issue of Gems & Gemology.
![Christie’s New York will auction this 13.15-carat VVS1 clarity, potentially Internally Flawless fancy vivid pink diamond ring at its Dec. 6 Magnificent Jewels auction, where it’s expected to sell for between $25 million and $35 million. (Photo credit: Christie’s Images Ltd. 2022) 20221116_Pink-diamond.jpg](https://uploads.nationaljeweler.com/uploads/d14869d24d5f5959100e6dc8d8e67c57.jpg)
It follows a few other notable fancy color diamonds at auction this fall, with mixed results.
![20221115_Alfie-Tucson-event.jpg](https://uploads.nationaljeweler.com/uploads/d31b77a62f4ad54c4d8cb49b8c0e20d6.jpg)
Slated for Saturday, Feb. 4, it will feature presentations, networking, and an evening component with music and dinner.