Events & AwardsOct 17, 2025
An Edit of Italian Jewels Is Coming to NYCThe new showcase dedicated to Italian jewelry design is set for Oct. 29-30.
SourcingNov 20, 2018
This Is Who Bought Gemfields’ 5,655-Carat Emerald
It is an Indian company known for its high-end colored gemstone jewelry.
Rajkumar and Rishabh Tongya of Dia-Color purchased the 5,655-carat “Inkalamu” rough emerald at Gemfields’ recent auction in Singapore.
London—After financing issues hurt its May emerald auction, Gemfields bounced back at its most recent sale, even finding a buyer for one particularly large piece of rough.
The colored gemstone mining company held an auction of higher-quality rough emeralds in Singapore from Nov. 14 to 17 that generated revenues of $28.4 million, with an average price per carat of $68.03.
The gemstone miner said “improved liquidity” among trade customers led to 74 percent of the carats on offer being sold. This compared with 56 percent at the last auction of higher quality emeralds held in Zambia in May, when Gemfields said the Nirav Modi fraud scandal made it difficult for Indian clients to get financing.
The auction was 77 percent sold by lot, up from 59 percent in May.
“The results of what was our first Singapore emerald auction in more than three years clearly reflect the emerging recovery among our trade customers after a protracted period of difficulty,” said Gemfields Managing Director of Product and Sales Adrian Banks. “The marked increases in the percentage of carats and number of lots sold, combined with the uptick in per carat price, bode well for further improvement in 2019.”
The highlight of the sale was the purchase of Inkalamu, the 5,655-carat emerald uncovered at Kagem in early October. Rajkumar and Rishabh Tongya of Dia-Color, an Indian company that specializes in high-end gemstone jewelry, purchased the rough gemstone.
Gemfields is not disclosing the purchase price but has said it will donate 10 percent of the proceeds to its conservation partners the Zambian Carnivore Programme and the Niassa Carnivore Project.
The Inkalamu emerald utilizes the Gübelin Provenance Proof nano-tagging, allowing all future stones cut from the rough to be traced not only to the mine of origin but to the gem of origin.
More on Sourcing
The Latest
TrendsOct 17, 2025
Piece of the Week: Judi Powers Jewelry’s ‘Stella’ EarringsTake a gaze at the sky with this pair of platinum diamond-set star earrings with blue lace agate drops.
IndependentsOct 17, 2025
From the Jazz Age to the Information Age: London Jewelers Turns 100In 2026, the jewelry retailer will celebrate a milestone only a small percentage of family-owned businesses survive to see.
Brought to you by
Protect Your Customers and Your BusinessYou deserve to know what you are selling–to protect your customers as well as your business and your reputation.
IndependentsOct 16, 2025
Retailer Hall of Fame 2025: Jeffrey Zimmer Jeffrey Zimmer's decades of leadership at Reeds Jewelers are defined by integrity, a love of sourcing gemstones, and a heart for community.
Weekly QuizOct 16, 2025
This Week’s QuizTest your jewelry news knowledge by answering these questions.
AuctionsOct 16, 2025
Sotheby’s Introduces Custom Jewelry ServiceThe new high jewelry design and production process takes 30 days or less from concept to completion, the auction house said.
MajorsOct 16, 2025
Oscar Heyman’s Holiday Catalog Is Out, and It’s SpectacularThe holiday catalog for 2025 features never-before-seen images of more than 100 one-of-a-kind masterpieces.
Brought to you by
JA New York Fall Is Right Around the CornerThe upcoming show provides savvy retailers with the opportunity to stock their cases with best sellers in advance of the holiday season.
CollectionsOct 16, 2025
Foundrae Adds To ‘United in Love’ CollectionThe brand has released a second installment of its collection of traditional and non-traditional commitment heirlooms.
IndependentsOct 15, 2025
Retailer Hall of Fame 2025: Kathy CoreyCorey rescued New England chain Day’s Jewelers, preserving its legacy with strong people skills, pragmatism, and a “get-it-done” attitude.
CrimeOct 15, 2025
Men Receive Lengthy Prison Sentences for 2023 Murder of Colorado JewelerCharles Robinson Shay was sentenced to life in prison plus 120 years while his accomplice, Michael James McCormack, got 75 years.
Events & AwardsOct 15, 2025
‘Douriean Fletcher: Jewelry of the Afrofuture’ Opens at MADThe Museum of Arts and Design's new exhibition features 75 pieces by the designer, best known for her work in the “Black Panther” films.
Events & AwardsOct 15, 2025
JCK, Luxury to Debut New Watch Section in Vegas Next YearTimepieces at Luxury will take place at The Venetian and, like Luxury, will be invitation-only for the first two days.
AuctionsOct 15, 2025
Christie's Announces New Jewelry Department LeadershipThe auction house named a new global head of jewelry, as well as a new head of the jewelry department for the Americas.
IndependentsOct 14, 2025
Retailer Hall of Fame 2025: Tom DixonAs chairman of Schwanke-Kasten Jewelers, Tom Dixon has been tasked with honoring the past and shaping the future of the family-run store.
Events & AwardsOct 14, 2025
Here Are the Winners of the BIJC, JA ‘Emerging Jewelers’ Grant Katty Villapando Lyte and Mica Rencher received a $10,000 grant for their business, Shimmer Culture LLC.
IndependentsOct 14, 2025
Day’s Jewelers Crafts Custom Jewelry for No.1 NBA Draft Pick Cooper FlaggThe parents of the Dallas Mavericks rookie bought their engagement ring at a Day’s store in Bangor, Maine, in 1997.
CollectionsOct 10, 2025
Count Down to the Holidays With Astrid & Miyu’s Advent CalendarsThe trio of Advent calendars include a version with 18-karat gold and lab-grown diamond jewelry in a red lacquer jewelry box.
CollectionsOct 10, 2025
Piece of the Week: Marla Aaron’s ‘Nymphenburg Lock’Created in collaboration with Nymphenburg Porcelain, the lock is part of a four-piece collection that took two years to bring to fruition.
MajorsOct 10, 2025
Frederick Goldman Names New VP of SalesJewelry industry veteran Alisa Bunger has taken on the role.
AuctionsOct 09, 2025
This Fabergé Egg Could Crack $27M At Auction“The Winter Egg” set the world auction record for a Fabergé piece twice at previous Christie’s sales.
MajorsOct 09, 2025
Sy Kessler Buying Watch Batteries as Silver Hits Record High The company will pay 1.5x silver’s current spot price for each pound of silver oxide batteries submitted.
CollectionsOct 09, 2025
Katkim Launches First Men’s CollectionThe line includes a “Shadow” series crafted exclusively for the new men’s offering and reimagined styles from the brand’s core collections.
SourcingOct 09, 2025
Gemfields’ Mini Mixed-Quality Ruby Auction Garners $11MThe rough on offer was recovered from a newer area at the Montepuez mine.
SourcingOct 08, 2025
In ‘Storied Diamond,’ Jared Jewelers Is Emphasizing the Journey The retailer’s new collection of engagement rings and fashion jewelry is set with natural diamonds that are traceable via blockchain.
CollectionsOct 08, 2025
Emily P. Wheeler Shifts Into Neutral for Latest ‘Ombré’ CollectionThe champagne colorway in her newest “Ombré” collection combines white and trendy brown diamonds, a departure from her usual vibrant hues.
CollectionsOct 08, 2025
Tsuba Designs Inspire Monica Rich Kosann’s New CharmsKosann partnered with the Museum of Fine Arts, Boston, to create a set of necklaces inspired by the artwork on samurai sword handguards.
