| Hong Kong Jewellery 香港珠寶
News & Highlight


  1. Q1 Gold Jewellery Demand Soft, Says WGC
  2. Jewellery Buying Groups Formed New Global Alliance
  3. Singapore to Host Jewellery & Gem World 2022
  4. ‘Wonder Woman’ Gal Gadot Premiered in Tiffany’s 2022 High Jewellery Collection
  5. Christie’s to Auction ‘The Light of Africa’ for $18M in June
  6. New Board of Directors were elected to Jewellery Exporters Association of Turkey
  7. Oroarezzo back with Première Competition
  8. ‘De Beers Blue’ auctions US$57.5M at Sotheby’s
  9. CTF launches Mother’s Day collection
  10. Jewelers of America Announces The 2022 CASE Award Winners
  11. De Beers: Diamond Businesses Staying Cautious About Business Expectations
  12. Synthetic Alexandrite Pioneer David Patterson Dies at 89
  14. Rebecca Foerster Appointed As President of Hearts On Fire
  15. US Steps Up Sanctions Against Alrosa
  16. PGI Study Findings: Consumers Have Different Interpretations of Sustainability
  17. Irving Wong Appointed as Pandora’s General Manager For China
  18. Rolex’s 6 New Watches Unveiled at Watches & Wonders Geneva
  19. Sixième Sens par Cartier High Jewellery: Heteractis Ring
  20. Will Russian Diamond Ban Help Foster Lab-Grown Diamond Business?
  21. Press Release: Ariana DeBose, Hunter Schafer and Zoey Deutch Shine in De Beers Jewellers at the Vani
  22. Press Release: Ariana DeBose, Hunter Schafer and Zoey Deutch Shine in De Beers Jewellers at the Vani
  23. JEWELLERY GENEVA Takes Place between 30 March and 3 April 2022
  24. Christie’s Presents 228 carat White Dimond
  25. Gold Bar Integrity Programme to be Implemented
  27. Early Spring Fashion for Natural Diamonds
  28. Jennifer Garner Shines in De Beers Jewellers at the Premiere in New York
  29. To celebrate its 15th anniversary, “Cartier Women’s Initiative Impact Report”
  30. American Gem Trade Association Announces Partnership with JCK Show Again
  31. Chow Tai Fook and Canada's Mountain Province Diamonds Sign Supply Agreement
  32. Registration Is Open for 2022 JCK Show
  33. Alrosa Caught Up in U.S. Sanctions
  34. Tawhid Abdullah Receives Lifetime Achievement Award
  35. The Largest Blue Diamond Appears at Sotheby’s Auction
  36. Price Rise for Nearly 90% Of Fancy Colour Last Year
  37. Dickson Yewn’s Collectibles Given for Sotheby’s Charity Auction
  38. De Beers Boosts Production
  39. Watches & Wonders Geneva To Be Held In Hybrid Format
  40. Jewellery, Gem & Technology Dubai to Debut February
  41. Hong Kong Losing its Dominance as the World's Largest Watch Market
  42. Gift Guide for CNY
  43. Press Release: Sotheby’s Announces New Appointments To Luxury Team In ASsia
  44. Georg Jensen Becomes a Certified Member of RJC
  45. 555.55-carat Black Dimond Unveiled at Sotheby’s Auction
  46. GIA Appoints Anna Martin as SVP for Institute, Industry Relations
  47. Alrosa Boosts Direct Sales of Fancy Diamonds to Investors
  48. CIBJO General Assembly postponed to March 17 and 18, 2022
  49. 7,525 Carat Emerald Discovered
  50. Karl Lagerfeld Jewellery Collections to Shine
  51. Diamonds Travel To The Space
  52. Vicenzaoro January postponed to March
  53. America’s Youngest Jeweller Starts Business via Instagram
  54. Concerns over conflict gold arise again
  55. The 1st International Gemstone & Diamond Trade Summit Wraps Up in Macao
  56. The Knot’s Study:Over 30% of Respondents Say Natural Diamond Unimportant
  57. Pantone’s 2022 Colour of the Year: Very Peri
  58. Phillips Jewellery Auctions Fetch over HK$181 Million
  59. The World’s First Pure Gold Castle of Magical Dreams by CHOW TAI FOOK
  60. Jewellery Sales Jumped 78% During the Thanksgiving Holiday
  61. Gem Auctions DMCC’s Debut Auction Successful
  62. Cartier’s Christmas Tree Lights Up the City with Love and Hope
  63. Rediscovering Lacloche in Hong Kong
  64. Blue diamonds to lead Christie’s HK autumn sale
  65. JMA show to stage next Thursday
  66. HK auction to help Cambodian kids
  67. Basel fair cancelled again
  68. HKDI show to continue in Dec
  69. Gemfields sells 7,500-carat emerald for good
  70. Sustainability is key to diamond purchases, a report says
  71. Christie’s Geneva jewellery sale fetches CHF53.7m
  72. Cibjo forms working group on fei cui standards
  73. Only Watch raises CHF30m for DMD research


  1. US market unfolds changes and potential
  2. The queen of gems, the gem of queens
  3. Classics return


  • Sherlock Holmes
  • Dror Yehuda
  • (From left) Dror, Roni, Meira, Zvi, Yael and Moshe Yehuda

Game changer

A magic wand was perhaps the only thing we could think of to hide the inclusions in diamonds. It was not until 1982 that the ‘trick’ could be done by technology when Zvi Yehuda came up with the idea of clarity enhancement which has revolutionised the diamond industry since then. Among the many other innovations, Yehuda has brought to the industry includes the 100-percent accuracy synthetic diamond detector Sherlock Holmes. Marketer of the clarity-enhanced diamonds Dror Yehuda tells us more about the technology, its impact, the laboratory-grown diamond issue, and a “larger detector”.

In a bid to maximise the size and beauty of polished diamonds, Yehuda Diamond Company has introduced a proprietary technology which makes certain types of inclusions within a diamond disappear and are completely invisible to the naked eye. President of the company Dror Yehuda explains: “The type of inclusion that the process can hide is called a feather. A microscopic amount of a patented substance having the same optical properties as the diamond is inserted into the inclusion. Now the light can pass through the inclusion which is no longer visible to the naked eye.” He added that if there is a hole, a cavity or a missing part in a diamond, the enhancement process cannot work.

Coming with a lifetime guarantee, the Yehuda Clarity Enhanced Diamond can withstand normal wear and tear by customers. “In the rare event that the diamond loses its enhancement, we will restore the enhancement at no charge,” Yehuda said.
He offers a rough estimate of the price comparison between untreated natural diamonds, Clarity Enhanced Diamonds and lab-grown diamonds. “The Yehuda Clarity Enhanced Diamonds are sold at about 30 percent discount compared with regular non-enhanced diamonds. Lab-grown diamonds are currently sold at about 60 percent discount over natural diamonds. To put it into numbers, if a natural diamond is sold at US$1,000, a Yehuda Diamond is sold at US$700, and a lab-grown diamond is sold at US$400,” he elaborated.

The introduction of clarity-enhanced diamonds has changed the profile of a diamond, as well as the profile of the diamond industry. “We have introduced the concept that a diamond can be ‘treated’ or ‘enhanced’,” said Dror Yehuda. “There was a huge resistance to it at the beginning. But the smart jewellers have adopted the idea of offering a larger diamond for less costs to the consumers. The product actually saved many companies from losing business especially in the technology/ Internet era. There were hundreds of diamond companies and thousands of jewellery stores around the world that made a living proudly selling clarity enhanced diamonds. The market was changed forever,” he said.

The proprietary product launched in the 1980s even paved the way for the smooth and overwhelming success of lab-grown diamonds, according to Yehuda. “For those jewellers who were already selling a different kind of diamond the concept was clear. They already knew how to sell a bigger diamond for less. They had 30 years of experience. All they need to do is change the title from Clarity Enhanced Diamond to lab-grown diamonds. Lack of training is usually the main reason for failure. Here they were trained,” he added.
The diamond industry in the past decade faced an unprecedented crisis, from De Beers’ stopping advertising all the way to banks’ withdrawal, shrinking credit lines and the rise of lab-grown diamonds. To restore the normality of the industry, Yehuda says that making sure the diamonds are clean is paramount.

“The new generation of customers clearly cares where the diamonds come from. They also care about whether the people employed in the industry are treated with honour and dignity. It is also important to continue advertising diamonds to the world with full force. Last but not less important is to keep lab-grown diamonds clean. Make sure customers get what they think they got. If consumers are cheated and lose confidence, the industry will be lost forever,” he said.

The fact that De Beers sets its Lightbox jewellery price at US$800 per carat has concerned the lab-grown diamond sector. Yehuda said prices of lab-grown diamonds are bound to go down with or without De Beers’ entering the market. “It opens the eyes of everybody that they should go into the lab-grown diamond market faster. It (De Beers’ move) may have reduced the time of the prices going down but when we talk about technology, no one can stop it. It also encourages many large companies to enter the field of lab-grown diamonds which De Beers didn’t foresee,” he said.

To Yehuda, the natural diamond and lab-grown diamond sectors can easily attain a win-win situation when people understand that lab-grown diamonds are here to stay and that many consumers like that idea. “If everybody will praise their own product and not degrade the other, there is no reason for both not to flourish,” he believes.

Designed to separate diamonds from synthetic diamonds, the Sherlock Holmes Detector developed by Yehuda detects 100% of lab-grown diamonds, according to Project Assure co-launched by the Diamond Producers Association (DPA). The flying result does not stop the inventor from moving further ahead. “Project Assure found that our device has between 2.2 and 2.4 percent false positive results, meaning with a small amount of natural diamonds, our device ‘thinks’ that they are lab-grown diamonds. We are developing a new edition with an even smaller amount of false positive results and a more user-friendly interface,” said Dror Yehuda.

He unveils that they are working on a larger Sherlock Holmes which can check 50 to 75 rings at a time, as well as large jewellery pieces such as bracelets and necklaces. “The market has been asking for this for a while and I can announce that it is coming shortly and will have the same 100 percent detection accuracy as its smaller-sized brother,” he said.

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