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  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
  13. 205 CARAT FANCY INTENSE YELLOW DIAMOND GENEVA MAGNIFICENT JEWELS | 11 MAY 2022
  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
  26. Press Release: BONHAMS ANNOUNCES ACQUISITION OF BRUUN RASMUSSEN AUCTIONEERS – DENMARK’S LEADING AUCT
  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
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HIGHLIGHT

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

Advertisement

  • The new mineral johnkoivulaite is named after renowned gemmologist John Koivula, best known for his contributions to inclusion research and photomicrography. Photo by Kevin Schumacher/GIA.
  • Johnkoivulaite shows strong pleochroism, going violet (left) to near-colourless (right) when examined with polarised light. Field of View:10.05mm. Photomicrographs by Nathan Renfro/GIA.
  • This 1.16-carat crystal of the new mineral johnkoivulaite was reportedly discovered in the legendary Mogok Valley of Myanmar in the Pein Pyit mining area. Photo by Robert Weldon/GIA.

New mineral named for famed researcher

The discovery of new minerals always adds colours to the coloured gemstone sector. Johnkoivulaite from Myanmar comes as the latest known species that excites the gemmological community.

 

The 1.16-carat stone was found in the Pein Pyit mining area of Mogok in Myanmar, according to the Gemological Institute of America (GIA). It was named in honour of John Koivula, a veteran GIA gemmologist and researcher for over 40 years.

 

After uncovered, the stone was obtained by a gem dealer from Mogok Nay Myao who sent the sample to GIA for identification. The unique gemmological properties of the unusual stone impelled GIA to buy it from the dealer in order to perform additional advanced testing and keep it in the GIA museum which is required by the International Mineralogical Association (IMA) before a new mineral is described. IMA formally accepted Johnkoivulaite as a new gem mineral species in September 2019.

 

In collaboration with researchers at the California Institute of Technology, GIA performed single-crystal X-ray diffraction (XRD) analysis which indicated a hexagonal crystal structure that was very similar to beryl and other members of the beryl group such as pezzottaite, said GIA. Johnkoivulaite’s membership in the beryl family was confirmed after chemical analysis by LA-ICP-MS and EPMA identified enrichment in cesium, boron and magnesium.

 

“Standard gemmological testing gave an RI of 1.608, with a birefringence too small to accurately measure, an SG of 3.01, a hardness of 7½, a conchoidal fracture, vitreous lustre, and no reaction to long-wave or short-wave UV. This mineral is especially unique due to the strong pleochroism it shows from deep violet to nearly colourless when observed with polarized light,” said the institute.

 

“We are privileged to be able to name this mineral after John Koivula who has contributed so much to science and the gem and jewellery industry as a prominent gemmologist and innovator in photomicrography,” said Tom Moses, executive vice president and chief laboratory and research officer. (Photo courtesy: GIA)

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