A Diamond's Journey:
Earth to Elegance

About Us

With our headquarters situated in Hong Kong, DDA Group specialises in the trade of diamonds. Our worldwide investments sees our presence within every stage of the diamond journey – from Earth to Elegance. Our development and commercial exploitation portfolio of five alluvial diamond projects located in South Africa are designed to prove, confirm and improve current resource estimates.

Our private equity fund, Sinolux Capital allows us to invest in diamond companies which provide funding solutions to the diamond trade. This provides the advantage of extending our industry network, widening our access to excellent quality rough diamond products. Sales of rough and polished diamonds; and the design, production and retail of our fine diamond jewellery collection, Iris Alexander takes us to the end of the diamond journey. Our journey is a shared passion with our customers and partners.



Iris Alexander honours the inimitable beauty of the world’s rarest and most precious gemstones, expressing their utmost potential with limited collections designed with audacity and reverence.

Attributing the ingenuity of high jewellery and its transformative nature, each piece encapsulates the relationship between a woman and the moments in her life; inspiring and creating them - for an occasion, and for a lifetime.



Rough and polished diamonds are sold on auctions conducted by DDA Trading BVBA, our affiliate company in Antwerp, Belgium, using its proprietary online diamond trading platform. Prior to each auction, our clients can inspect offered diamond parcels at viewings in Antwerp, Dubai or Hong Kong.

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Our origins in diamond trading commenced long before our involvement in the production and sales of our fine jewellery line, Iris Alexander. Our Hong Kong entity Sinolux Capital funds selected diamond exploration and mining companies around the world on either a debt or an equity basis. It continues with the offer of financing to both producers and buyers within the diamond trade. This cooperation expands our network of in-depth relationships in the industry, and extends our access to premium rough diamond product.

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Media & News

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Alrosa Offers 15ct. Purple-Pink Diamond

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Tiffany & Co. will open its doors in India

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Pink fancy-color diamonds outperformed major colour categories

Dubai Set to Improve Diamond Tender Offering

US Retail Sales Grow in June

Chow Tai Fook China Sales Rise

Women’s Jewelry Association reveals winners of 2019 Excellence Awards scholarships

Rio Tinto Unveils Roster of Pink Diamonds

India introduces import classification code for lab-grown rough diamonds

Forevermark Unveils New Bridal Campaign

Gucci makes its move into high jewelry

Global Diamond Production Value Rises

GIA Expands China Education Programs

The price millennials are willing to pay for an engagement ring

Luxury Goods Market Grows 6% in 2018

Christie’s sale brings in more than $109 million

HRD Antwerp launches drop-off center in London’s Hatton Garden

Sotheby’s auction included pieces by Harry Winston, Van Cleef & Arpels, Tiffany & Co. and Buccellati

MJSA Picks 14 Vision-Award Winners

GIA to offer provenance reports for coloured diamonds

Sotheby’s to Sell Treasure Chest of Luxury Watches

RapNet Offers Jewelry Trading to the Industry

11ct. Purple Expected to Fetch Over $10M

Watches of Switzerland to Go Public

Chow Tai Fook Launches US Hub

Pink Diamond Prices Firm in 1Q

US Retail Market Rebounds in March

LVMH Moët Hennessy Louis Vuitton to participate in Baselworld 2020

Americans will shell out $5.2 billion on Mother’s Day Sales

The Natural Color Diamond Association Announces Advisory Board

Botswana Unveils 20ct. Okavango Blue Diamond

Bonhams Auctions Original Cullinan Agreement

Graff Reveals 302ct. Diamond from Lesedi La Rona

US Trade Confident as Polished Imports Surge

Christie’s to sell historic tiara

Silver-jewelry sales rise for 10th consecutive year

The American Gem Society (AGS) to honor three industry leaders at its Circle of Distinction dinner

Women in Luxury Conference to be held in New York on May 9

DPA launches e-learning course for retail associates

Alrosa Testing Payments in Euros

US retail sales bounce back

Hong Kong Luxury Sales Rise in January

$15.5M Diamond Crown for sale on RapNet

Lady Gaga Shines with 128 Carat Diamond at Oscars

Rough-to-Polished Gem Tracker Launched

First China-Israel Diamond Week to take place in Shenzhen

Flawless white diamond estimated at $13 million to lead auction at Sotheby’s

Activity Rises in India Ahead of Hong Kong Show

Gemmological Association of Great Britain expands to US market

$20.7 billion on gifts this Valentine’s Day by US

HRD Grades First Lab-Grown All-Diamond Ring

Boaz Moldawsky Elected IDI Chairman

Reduced supply of vivid-yellow diamonds to drive price increase this year

Mouawad Dragon – largest of its shape and color GIA has ever graded

The Gemological Institute of America to expand Colored Stone Identification & Origin Report services

Regina Ciarleglio new director of membership, Jewelers of America (JA)

Belgium Prepares for ‘No-Deal’ Brexit

Alrosa resumes diamond-mining in Zimbabwe

27-carat rough diamond recovered from Karowe mine

January Jewellery Sales on the rise

Dr. James Shigley receives GIA Top Honor Award

India to Promote Jewellery in UAE

Nilesh Sheth to Continue as IDCA President

Diamond Polishing Facilities planned in Angola & Zimbabwe

Rare Opal Contains Trapped Insect

HRD to Open First Middle East Jewellery Lab

Christie’s 2018 jewellery sales hit US$492.3m

Dominion Unearths 553ct. Yellow Diamond

India Strengthens Position in Diamond Cutting

Gem Group Clarifies Sapphire Colour Requirement

Canada’s NWT Lifts Polishers’ Export Ban

29.53-carat diamond leads HK sale

53 million US consumers to buy a diamond during festive period

Sapphire Necklace Sells for $15M

Cyber Monday – largest US online shopping day of all time

Belgium Exports Rise Amid Higher Average Price

India’s polished diamond exports on the rise

Gemfields Sells 5,655ct. Emerald at Auction

Ethiopia – new sapphire and emerald source

China reports 4.7% rise in Oct jewellery sales

Pink Legacy fetches US$50m

24ct. Diamond to Lead Bonhams Auction

14ct. Diamond ring sold for more than double at Fellows

Graff to Unveil Polished from 1,109ct. Lesedi La Rona

Bulgari Fancy Vivid Blue to lead Christie’s New York auction

Alibaba Signes Deal with Antwerp Trade

The Peacock Necklace leads Christie’s Magnificent Jewels auction

Rapaport Weekly Market Comment

A blue diamond will go under the hammer at Sotheby’s

Gemfields reveals 5.65-carat ‘Inkalamu’ emerald

Alrosa Joins De Beers Blockchain

Signet Sells First ‘Conflict-Free’ DRC Gold

Rapaport Weekly Market Comment

CIBJO Urges Diamond Consultation with FTC

Istanbul Fair reports strong buyer turnout

Lozenge Emerald sold for more than double at Sotheby’s

Christie’s to Sell 24ct. Marilyn Monroe Diamond

Coloured gem blockchain system takes off in 2019

CIBJO Urges Better Control of Gemstone Supply

GIA scientists uncover new mineral

Gemfields highlights responsible sourcing

RJC Signs Deal with Artisanal Gold Miners

Blue Sells for $14M at Sotheby’s Hong Kong

GSI Opens Hong Kong Lab

HK’s jewellery exports up 18.4%

Emerald Diamond sold at NY Auction

19ct. Oppenheimer Pink Diamond Could Set Records

Platinum jewellery demand grows

Rapaport Weekly Market Comment

Millennial and Gen Z generations accounted for two-thirds of global diamond jewellery sales

JNA Awards 2018

DEF Establishes First Scholarship

GIA & Chow Tai Fook Unveil Digital Grading Report

HKJMA celebrates 30th anniversary

Antwerp Polished Diamond Trade Generates Value Gains

AWDC Antwerp Summer University welcomes students

Rapaport Weekly Market Comment

Hong Kong Jewellery sales stay positive

India will overtake US in 2018 Jewelry Sales

Japan’s First Synthetics Production

More Synthetic Warnings

Coloured gems will dazzle at September Fair

Sarine Opens Service Center in Japan

Gold price drop could prompt jewellery buying

TrueFacet to list preowned luxury items

IGT Thailand opens facility in Bangkok

Rio Tinto has begun mining new pipe at Diavik Mine

Rapaport Weekly Market Report

138-carat rough diamond found in Lesotho

GJEPC opens an office in China’s Shenzhen Rough Diamond Exchange

7.16-carat Russian emerald takes top prize

Prices of fancy colour diamonds steady in Q2

GIA to Issue $2M in Scholarships

Israel Bourse Bans Traders for Synthetics Swapping

Greater China Luxury Continues to Grow

New Jewellery Show Comes to NY

Industry Hopes to Appeal FTC Guidelines

Israel’s Polished Exports Fall

Indian Banks Cut Lending by 10%

Indian Gem Center Rebrands as IIG

Zimbabwe Output Rises

Rapaport Weekly Market Comment

New York Shows Unite in One Location

Belgian polished trade in upward trend

WJA reveals the winners of 2018 Excellence Awards scholarships

Canada Lifts Global Diamond Production in 2017

Largest Pink Synthetic gets GIA Grade

Israel Urges India to Reduce Diamond Tax

World Diamond Congress Set for Mumbai

Rapaport Market Comment

Rapaport Academy Launches Marketing Courses

Israel Bourse Ends Cryptocurrency Deal

India’s Polished Exports Rise in May

New JewelPoint Event to launch this year

Chinese Bourse Hosts India Diamond Week

Rise in Sales in US Jewellery Stores

Synova Opens Diamond-Cutting Center in Mumbai

Lift in Luxury in Hong Kong and China

Rapaport: Laser Firm Addresses Diamond Counterfeiting

Royal Diamond Tiara to be auctioned at Christie’s

$20M Diamond Reserve generated by New Cryptocurrency

31% rise in visitor numbers of Shenzhen Fair

US Consumers: synthetics are not real

Rapaport: Farnese Blue diamond smashed its pre-sale estimate at Sotheby’s

Fancy Blues pricing jumped 5%

Gem Genève trade fair hailed as a success

Jump in Polished Imports in Hong Kong

DDA Trading to offer 4000cts at the May Polished Diamond Tender

VAT reverse-charge in UAE

Sales and profit growing sharply at Tse Sui Luen, Hong Kong

Israel Extends Tax-Free Inspection Period

Jewellery industry icon graced Antwerp expo

Iris Alexander Finest Diamond Jewellery Dubai Launch

The grace and symbolism of dragonflies in jewellery

GIA Opens Synthetics-Testing Center Inside Stuller

$500M to be invested into New Diamond Fund

US-China Trade War won’t impact Diamonds

Rapaport: Sotheby’s to Sell Two Large D-Flawless Diamonds

Hong Kong Polished Imports Rise

JVC will Launch Legal-Info Webinars

Hong Kong Jewelry Sales Rise due to Tourism Increase

Sotheby’s to Sell 33ct. Flawless Diamond Necklace

Israel’s Get Diamonds Forms China Partnership

Christie’s to Auction 8ct. Pink Diamond Ring

Royal Blue Diamond Surfaces After 300 Years

Phillips to Open First Gallery in Asia

India’s Polished Exports Edge Up

Rapaport: US Polished Trade Picks Up in January

Sotheby’s Hong Kong to Sell 14ct. Blue Diamond

“Lesotho Legend” sells for $40M in Antwerp

DPA Eyes Chinese Millennial Market

10.4% rise in Jewellery sales in HK in January 2018

Belgium Sees Rise in Polished Trade

Jewellery park to be built in Mumbai

Ethically-Sourced Gem Fair Comes to UK

Strong Rough Trade Boosts Antwerp Rough Diamond Days

$284M Boost to Diamond Trade

GJEPC Predicts Strong Year for Jewellery

IMDH To Auction 35,000 Carats of Namibian Marine Diamonds

Traders Optimistic at Israel Diamond Week

Sotheby’s Offers Rare 102ct Diamond

Consumers plan to spend $19.6 billion on gifts this Valentine’s Day

Diamond Prices Rise in January

Blue Diamonds Push Fancy Colour Index Up Slightly in Q4 2017

Chinese New Year Boosts Jewellery Sales

Chinese Millennials: Diamonds Symbolize Empowerment, Not Just Marriage

Bharat Diamond Bourse (BDB) to host its first Indian Diamond Week

CARAT+ in Antwerp in May 2018

DDA Trading Bvba is pleased to announce its first Polished Diamond Tender

Diamond Dealers Club (DDC) of New York moves into its new home

Sapphire Ring Seals Royal Engagement

India’s Diamond Trade Grows in 2017

Automated Diamond Grading Lab to open in Israel

#No Glass Ceiling

Diamond Cryptocurrencies to launch in Israel

DDA Trading To Auction 25,000 Carats of Namibian Marine Diamonds

Gübelin will Build Gemstone Blockchain

GIA Unveils Plans for Labs in Surat and Antwerp

Hong Kong Exports expected to grow in 2018

Diamond Prices Steady in December

Impressive Season for Retail

Iris Alexander 2018 Fine Diamond Jewellery Collection held at The Ritz London on 12 December

Antwerp Diamond Trade is Solid in November

Blue Diamond Sells for $15M at Sotheby’s NY

Optimism Rises as Holiday Season Begins

Mobile-Savvy Millennials Drive Cyber Monday Jump

Christie’s Hong Kong Sells Pink Diamond for $32M

DDA Trading To Auction 22,000 Carats of Namibian Marine Diamonds

Meghan Markle’s Ring

Pink-Purple Diamond Ring Goes For $1.2M

Hong Kong Polished Trade Improves

Historic Yellow Diamonds to Auction

The making of Louis Vuitton Conquêtes necklace

Flawless 163.41-carat Diamond Breaks Record at Christie’s

The best fine jewellery brooches

Sotheby’s to Sell Record 111ct Diamond & 5.69ct Fancy Vivid Blue

Belgium Sees Rise in Polished Exports

Blue Diamond Scarcity Drives Price Rise

Beyond Boundaries: Inside Christie’s £2.5 million sale of museum-worthy Art Nouveau and Art Deco jewellery

Hong Kong set to auction $42 million ‘Pink Promise’ diamond

Rare Argyle Fancy Red Diamond is Being Debuted in Taiwan

Who is Driving Luxury Spend Growth?

Storied Yellow Diamonds Could Sell for $14M

19.07ct Pink Diamond of French Royal Provenance set to be sold at Chrsitie’s

34.17carat Fancy Vivid Yellow Rough Diamond Recovered

813ct Constellation Rough to be Cut in Dubai

$100M of Coloured Diamonds put on display

Blue Diamond Goes Unsold at Sotheby’s

Crowning Glory: How the tiara came back into style

Petra to Resume Sales from Williamson Mine

Jump in Chinese Diamond Imports

180 lots set to go under the hammer at Bonhams Fine Jewellery Sale

Jewellery Overtakes Cars as Investment Prospect

Petra Hit by Strikes at Two Mines

Miners Could Start Hunting for Young Diamonds

Blue-Pink Ring Stands Out at Biennale Paris

Belgium’s Polished Trade Improves

Sotheby’s to Sell Cartier Bracelet in Hong Kong

Sotheby’s Autumn-Themed Jewels

Emerald-cut diamonds top choice for celebrities in 2017

Bonhams to auction the largest ever private collection of Grima Jewellery

The Red Argyle Everglow is unveiled

Diamond Producers Association Surveys US Millennial Women on Luxury and Diamonds

Rio Tinto Showcases Cognac-Champagne Necklace

India’s Polished Trade Improves in June

GJEPC Unveils 5-Year Plan to Boost Indian Exports

The most spectacular High Jewellery at Paris Haute Couture Week

Dubai Diamond Conference Set for October

Global Rough Trading Jumps in 2016

Rockefeller Emerald sold for a record price per carat at Christie’s New York

Optimism for Hong Kong as Show Begins

Cartier Releases New ‘The Proposal’ Films

Millennials Prefer Offline Shopping

Rapaport 5 Takeaways from Las Vegas

Antwerp Sees Improved Polished Trade

Flea market Diamond Ring bought for $13 sells for $847,667

The best jewellery at the Cannes Film Festival 2017

Untapped Ekati Pipe May Hold 16M cts

Christie’s Sells 92ct. Heart Pendant for $15M

Diamond earrings sell for $57.4 million

A Magnificent Diamond Ring the Top Sale at Christie’s, 22ct for $2.6M

The Jewels Of The World Collection to be offered by Bonhams as part of its Rare Jewels and Jadeite sale.

Insights About ‘Chocolate’ Diamonds

The Comeback of Transformable High Jewelry

59.6-Carat Pink Star Sold For Record $71.2M

Chopard Collaborates with Rihanna

Christie’s Magnificent Jewels auction headlined by 92.15 carat D IF heart shaped diamond

Sierra Leone To Sell 709 Carat Diamond by International Tender

Shenzhen Bourse to Embrace Polished Diamonds

Hong Kong Trade Fairs Totaled 85K Visitors, Diamond Traders Optimistic

China’s Polished Imports Rise in 2016

887 Carat Emerald to be Auctioned in New York

Antwerp Archives Reveal Diamond Trade Dating Back to 1447

‘Rare Brilliance’ exhibited in Los Angeles

Source Of Biggest And Rarest Diamonds Discovered

Jewellery Auctions, truly magnificent for both Christie’s and Sotheby’s

NUTAM Operations (Pty) Ltd (“NUTAM”) completes the first phase of its trenching operations off the Namibian coastline.

Lerala Diamond mine signs off-take agreement for ROM production

A 9,381-carat topaz will go on display at the Natural History Museum’s minerals gallery from October 19th.

Bonhams to auciton 3.81ct Fancy Intense Blue

Argyle Red Diamond Coin Sold

London’s Jewelry District to get $3M Makeover

121.26ct white diamond recovered at the Cullinan mine sold for $6.0 million ($49,480 per carat)

Petra Diamonds discovered a 121.26ct rough diamond at its Cullinan mine in South Africa.

Graff Reveals 105ct. Flawless Diamond in Paris

Christie’s reveal yet another surprise for this auction season.

Pink Diamond Sells for $32M at Sotheby’s Geneva

Oppenheimer Blue draws $58M

Will Upbeat Rough Demand Slow the Diamond Market Recovery?

Pink Pear-Shape Diamond Tops Sotheby’s Geneva Billing

Largest Fancy Vivid Blue Diamond in Auction History Estimated at up to $45M

Shirley Temple’s Blue Diamond Expected to Sell for up to $35M

Sotheby’s to Auction World’s Second-Largest Rough Diamond

Christie’s to Auction Items Belonging to Late Entertainer Joan Rivers

Participation Grows at Two Hong Kong Shows

Joseph DuMouchelle to Auction Jewels Estimated at up to $1.2M

US Jewellery Prices Rise 7% in January

Fancy Colour Diamond Prices Rise on Shortages, Strong Holiday Sales