Professional insight and education from from IGI Worldwide

102 carat diamond sells for $15.7 million, breaking records
Photo credit: Sotheby's

102 carat diamond sells for $15.7 million, breaking records

A private, anonymous collector bidding by phone from Japan is the new owner of the first high-value item of its kind ever offered "without reserve" by Sotheby's. Originally a 271 carat rough diamond unearthed in 2018 at the Victor Mine in Ontario, Canada, it was cut into this 102.39 carat D Flawless oval shape by Diacore.

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Phenomenal, prismatic, iridescent Ammolite

Today we turn our attention to the optical phenomenon of iridescence, that is the display of dispersive prismatic colors caused by the interference of light - generally due to thin films of gas or liquid - like Iridescent Quartz, Iridescent Agate and Ammolite.

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IGI publishes ‘New Normal’ advice via JCK online

IGI has provided insight and advice to diamond, gem and jewelry industry professionals in tandem with JCK Online's sponsored-content initiative: "Solving New Trends in the New Normal" addresses explosive growth in two disruptive industry areas.

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DeBeers ‘ReSet Collective’ launches with 5 prominent jewelry designers

DeBeers has launched an initiative titled ReSet; a series of collaborations with jewelry designers spotlighting the positive impact of natural diamonds and stimulating conversations about sustainability.

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9.07 carat diamond found on 9/07 in Arkansas
Photo credit: Arkansas Department of Parks, Heritage, and Tourism

9.07 carat diamond found on 9/07 in Arkansas

Kevin Kinard visited Crater of Diamonds State Park regularly for more than 25 years, but never found a diamond until Labor Day 2020. Now he has the distinction of discovering the second largest diamond to ever come from the popular Arkansas tourist site, at just over nine carats.

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IGI Jewelry Design Contest FINALISTS NAMED

Following a 40 day period of submissions and evaluation, IGI’s international panel of prestigious judges has advanced 30 design concepts to the final round of the 2020 IGI JEWEL Jewelry Design Contest. These creative works, which can be seen here, were selected for creativity, use of materials, budget, feasibility of production and wearability.

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Meylor produces record-setting 100+carat black lab-grown diamonds
Photo credit: IGI Worldwide

Meylor produces record-setting 100+carat black lab-grown diamonds

Earlier this month IGI received two large HPHT-produced lab-grown diamonds for analysis and grading. One of those stones has become the Guinness World Record Holder for the largest black lab-grown diamond in history.

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See IGI’s dynamic new Grading Report format

We are pleased to announce a new, elevated design for our identification and grading reports. This design update comes 45 years after our first Diamond report was issued in Antwerp, Belgium, in 1975.

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Petra finds 5 rare blue diamonds totaling 85+ carats!
Photo credit: Petra Diamonds

Petra finds 5 rare blue diamonds totaling 85+ carats!

Can we call them the Blues Brothers? Individually weighing 25.75 carats, 21.25 carats, 17.57 carats, 11.42 carats and 9.61 carats, Petra Diamonds reports that these spectacular siblings were assessed to be individual stones, not originally part of a larger diamond.

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IGI diamond grading among the world’s strictest
Photo credit: Tingey Injury Law Firm

IGI diamond grading among the world’s strictest

Another independent analysis has concluded that IGI's loose diamond grading ranks among the world's strictest. In an independent comparison of dual-certified diamonds IGI's color grading was stricter than that of GIA in a majority of cases, with clarity the same or stricter in most cases, as well.

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