After eight years, Gilbertson is leaving his post at the mining company, which is currently facing a slew of operational challenges.
The Top Auction Sales of 2015
From rare and colored to large and flawless, many of the diamonds sold this year at auction were world record-breakers.

New York--Large colored diamonds, deeply hued rubies and colorless diamonds proved to be the most sought-after gems at auction this year, with all three comprising the top 10 jewels sold at auction in 2015.
The results are not unlike last year’s; in 2014, the jewel that fetched the highest price at auction was the “Zoe Diamond,” a 9.75-carat fancy vivid blue that sold for $32.6 million. A blue diamond also took the No. 1 spot for 2015, but upped the ante as far as size and price goes--the “Blue Moon of Josephine,” a 12.03-carat fancy vivid blue diamond graded as internally flawless, sold for $48.5 million at Sotheby’s Geneva in November.
A diamond called the “Sweet Josephine,” purchased by the same buyer for the same individual, sold for $28.5 million at Christie’s Geneva, also in November. The 16.08-carat cushion-shaped fancy vivid pink diamond ranked third overall for the year in terms of highest price paid for a gem at auction, with the “Sunrise Ruby,” a pigeon’s blood-red 25.59-carat ruby, coming between the two colored diamonds.
Aside from the high-achieving jewels that set world auction record after record this year, a few more “fun” lots also made it into the news. Among them was the 24-karat gold leaf grand piano that once belonged to Elvis Presley, which sold for $610,000 in November. There also was the Omega Constellation wristwatch Elizabeth Taylor gave to Richard Burton, which pulled in $12,000 at a sale in September, and “Yorick,” the skull carved from a meteorite, which failed to sell at a Bonhams auction in November.
Look through the attached gallery (on the right) to see the diamonds and gemstones that comprised the top 10 jewels sold at auction in 2015, some of them setting new world auction records.
The Latest

The new location is set to open this winter, featuring the retailer’s first rotating jewelry designer residency.

The pop artist appears in the latest campaign for the “Laurence Graff Signature” collection.

Colored gemstones, artisan finishes, mixed metals, and meaningful details are shaping demand in bridal jewelry.

One-of-a-kind pearls take the shape of ice cream cones, frogs, submarines, and other imaginative charms.


Charlotte Rose said her election is “a sign that this is an industry capable of change.”

Sponsored by Rio Grande Jewelry Supply

DCA is preparing the next generation of professionals by supporting workforce development, leadership growth, and career advancement.

The American jewelry house, founded by Latvian immigrants, has been creating American flag brooches since 1917.

The artwork celebrates the Atlanta jeweler’s legacy and symbolizes its commitment to supporting local artists and its community.

Its team can evaluate jewelry and watches, as well as luxury handbags, artwork, and collectibles.

Falling oil prices were a factor in the slight month-over-month improvement.

The new offering comprises more than 120 bridal and engagement ring styles with natural and lab-grown diamonds.

The clock is part of the celebration for the soon-to-open Rolex headquarters on New York City’s Fifth Avenue.

The public relations professional is remembered for her benevolent generosity and unwavering commitment to those around her.

The new watch commemorates Pokémon’s 30th anniversary.

The luxury retailer is now called Exemplar Luxury Group.

The “Lady” collection is a new take on old beauty standards with gemstone-adorned hair pins and combs, a compact mirror necklace, and more.

The new line is included in the e-tailer’s curation of jewelry celebrating America’s 250th anniversary.

All active members who earned their credential or designation before Dec. 1, 2025, are required to recertify.

The new jewelry collection uses a colorful palette of onyx, malachite, tiger’s eye, mother-of-pearl, lapis, turquoise, and coral.

Lee Michaels Fine Jewelry is celebrating 30 years in the Ridgeland, Mississippi community.

Sean Milliner has joined the company.

Classes will begin in August at GIA’s new Canary Wharf location.

The rainbow version of the ring, our Piece of the Week, features angel-cut, octahedral lab-grown sapphires designed to be worn as armor.

The new initiative donates a portion of the proceeds from select charms to charitable causes.

The Brooklyn-based jeweler created a limited-edition version of its “Aura” eternity band, set with gemstones in the team’s colors.




















