Sourcing

This Is Who Bought Gemfields’ 5,655-Carat Emerald

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.

20181030_Inkalamu-emerald.jpg
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.

Brecken Branstratoris the senior editor, gemstones at National Jeweler, covering sourcing, pricing and other developments in the colored stone sector.

The Latest

Mervis Diamond Importers store
IndependentsOct 27, 2026
Solomon Brothers Acquires Mervis Diamond Importers

Solomon Brothers, which has three stores in the Metro Atlanta area, said it may continue to acquire other independent jewelers.

Woman holding testing swab
IndependentsOct 27, 2026
Gabriel & Co. Supports Charity Partner DKMS With Gala, New Jewels

The fine jewelry brand raised $2.3 million at its annual gala that supports the nonprofit’s fight against blood cancer and blood disorders.

Sarin Bachmann and Julie Walsh
Events & AwardsOct 27, 2026
JFC Announces 2027 ‘Facets’ Honorees

The annual fundraising event is slated for June 6, 2027, at The Venetian Resort in Las Vegas.

DeBeersICONS_TITLE1_CUSTOMCONTENT_1872x1052 (1).jpg
Brought to you by
A Diamond Is Forever Launches 2026 Holiday Campaign Championing Natural Diamonds

A Diamond Is Forever's holiday campaign reimagines natural diamond icons for a new generation celebrating individuality.

Ali Ahn in Bliss Lau Vantage Collection Campaign
CollectionsOct 26, 2026
Bliss Lau’s ‘Vantage’ Point Is the Hawaiian Horizon

In her “Vantage” collection, Lau explores heritage, identity, and inner strength through designs featuring blue-green Guatemalan jade.

Weekly QuizOct 22, 2026
This Week’s Quiz
Test your jewelry news knowledge by answering these questions.
Take the Quiz
Behind the scenes shot of Tiffany & Co.’s Design and Innovation Workshop
MajorsOct 26, 2026
Tiffany & Co. Takes Consumers Behind the Scenes

The jeweler gave the public backstage tours of its flagship store and its design and innovation workshop as part of LVMH’s open house.

Jewelers for Children Halloween contest
Events & AwardsOct 26, 2026
Support JFC’s ‘Monster Mash Challenge,’ If You Dare

Vote for which jewelry professional should dress up as a monster to support Jewelers for Children’s annual Halloween fundraiser.

lab channel btyb 0926.png
Brought to you by
Open an Account, Get $50 Off Your First Order. No Code Needed.

Built on Relationships. Refined by Craft.

Image from PGI USA Platinum Born campaign
MajorsOct 23, 2026
PGI USA Set to Close at Year’s End

The closure is part of a global restructuring that also includes PGI winding down its operations in Japan, South Korea, and Hong Kong.

Jewelers of America new logo
TechnologyOct 23, 2026
JA Unveils New Website, Logo

The website offers enhanced member benefit access, industry directories, educational resources, a job board, and access to the MJSA Journal.

Pomellato Paraíba high jewelry choker necklace
FinancialsOct 23, 2026
Kering’s Jewelry Sales Up Double Digits in Q3

Boucheron and Pomellato had a strong third quarter, with Kering looking at jewelry as an increasingly important part of its portfolio.

Stock image of crime scene tape and police cars
CrimeOct 22, 2026
Jeweler Shot and Killed in His Suburban Cincinnati Store

Tara Sinchuri was the owner of Everest Jewels in Fairfield, Ohio, and a father of three. He was found dead in his store on Tuesday.

Verdura cuffs
MajorsOct 22, 2026
Neiman Marcus Has Gifts for the Jewelry Lover Who Has Everything

Bespoke experiences from Buccellati and Verdura are on the retailer’s 2026 “Fantasy Gifts” list.

JIS Fall 2026 jewelry
Events & AwardsOct 22, 2026
JIS Fall 2026 Reports Record-Breaking Attendance

The number of participants at the fall show was up 12 percent.

John Hardy Billie Eilish & Finneas Collection Campaign Imagery
CollectionsOct 22, 2026
Billie Eilish, Finneas Co-Design Collection for John Hardy

The Academy and Grammy award-winning siblings have collaborated with John Hardy on a new jewelry line inspired by their personal style.

Graphic for episode 10 of the My Next Question podcast
PodcastsOct 21, 2026
Episode 10: This Episode Is Haunted 

Diana Singer shared the stories of two “cursed” diamonds on this month’s podcast, which was inexplicably riddled with technical issues.

Gardner Collier Jewelry store in Kirksville Missouri
IndependentsOct 21, 2026
Gardner-Collier Jewelry to Close After 9 Decades in Business

The family-owned jeweler has three locations across Missouri and Iowa.

Underground shaft at the Venetia diamond mine
SourcingOct 21, 2026
Venetia Mines Final Carats Ahead of 2-Year Shutdown

The De Beers-owned diamond mine in South Africa is being put on ice as part of a round of previously announced cost-cutting measures.

Off-White Jewelry Collection Imagery
CollectionsOct 21, 2026
Helzberg, Nordstrom Carrying New Jewelry Collection From Off-White

The collection centers designs with clean geometric lines, chunky sculptural pieces, and recognizable details from the luxury fashion brand.

Gemfields rubies
SourcingOct 21, 2026
Gemfields’ Mixed-Quality Ruby Auction Earns $52M

The miner said it saw particularly strong prices for larger, fine-quality rubies at the sale.

Stock image of police cars with lights on
CrimeOct 20, 2026
Security Guard Charged With Murder in Shooting at Texas Mall

The guard opened fire on a man who was smashing a jewelry display case at La Gran Plaza in Fort Worth last week, police said.

David Gardner’s Jewelers interior
IndependentsOct 20, 2026
David Gardner’s Jewelers Unveils Newly Expanded, Revamped Showroom

The Texas jeweler added 2,000 square feet to its reimagined showroom, complete with a new design studio and an event space.

Kylie Jenner Fantasy Bra Victoria’s Secret Fashion Show
SourcingOct 20, 2026
The $50M Victoria’s Secret ‘Fantasy Bra’ By The Numbers

Jacob & Co.'s diamond masterpiece is the most expensive Fantasy Bra ever worn on the Victoria’s Secret Fashion Show runway.

Mignon Faget Atelier Collection Campaign Imagery
CollectionsOct 20, 2026
Mignon Faget’s Collection Chooses Handmade Over AI

The “Atelier” collection was inspired by the tools, rituals, and objects in an artist’s studio as a quiet rebuttal to an automated world.

 Rio Grande engagement ring and band
MajorsOct 19, 2026
The Knot to Acquire Rival Wedding Planning Platform Zola

The pending acquisition is an “exciting opportunity” for wedding vendors to grow their business, said The Knot Worldwide’s CEO.

The Secret Gems Thailand
SourcingOct 19, 2026
Jewelry Design Competition Show Airs in Thailand

"The Secret Gems" features eight Thai jewelry brands paired with a team of young craftspeople who create jewelry together to win challenges.

John Hardy Modern Talisman Collection Campaign Imagery
CollectionsOct 19, 2026
John Hardy Enters the Medallion Chat With Talisman Collection

The brand’s “Modern Talisman” capsule collection introduces pendants inspired by the mythology, natural world, and spiritual ethos of Bali.

×

This site uses cookies to give you the best online experience. By continuing to use & browse this site, we assume you agree to our Privacy Policy