IGI Hong Kong certifies largest CVD grown diamond to date

Following a similar benchmark set three months ago, IGI Hong Kong recently certified the largest laboratory-grown diamond received to date. With a finished weight of 12.75 carats, this collection-quality man-made gemstone was fashioned from a staggering 46.20 carat CVD-grown rough crystal

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See IGI’s new Digital Report Platform

Shopping by computer and smartphone is on the rise, with no sign of stopping. In the interest of serving consumers and retailers alike, IGI recently introduced a new digital platform for loose or mounted diamonds, gemstones and jewelry items.

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Lab-grown diamonds in rainbow colors
Photo credit: Diamond DNA

Lab-grown diamonds in rainbow colors

Do you remember when our friends at Diamond DNA had us grade that incredible 10-carat lab-grown diamond transformed from intense yellow to vivid pink using an electron beam? This time…

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Keeping diamond color in context
Photo credit: 204park.com

Keeping diamond color in context

Where do you start seeing color in diamonds? Can you see the difference between F and H color? Can you see the difference between D and E color? In full context those answers will become diamond-specific.

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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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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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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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What are ‘Hearts & Arrows’ diamonds?

Hearts & Arrows (H&A) diamonds are precisely cut to show kaleidoscopic patterns when seen in a special reflective viewer. Typically associated with Excellent-Ideal cuts of superior quality, fashioning the highest levels of H&A optical precision when working with the world's hardest substance is an exacting process.

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