FAQs, advice and education from from IGI Worldwide
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.
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.
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.
ALROSA reported more than $20 million in revenue generated by special-size rough diamond auctions in Belgium and Israel this month. The diamonds were sold to clients from Belgium, India, Israel and United Arab Emirates.
An exceptionally rare, clear diamond "the size of a lollipop" is being offered without reserve at auction by Sotheby's. According to the auction house, an item of this historic importance and value has never been offered with no-reserve before.
The last two 100+ carat diamonds, unearthed over a span of 48 hours, are the 10th and 11th gem-quality stones weighing more than 100 carats found at Letšeng this year. At an elevation of more than 10,000 feet, the world's highest diamond mine also boasts the world's highest value-per-carat.
The Argyle Diamond Mine in the remote east Kimberley region of Western Australia is scheduled to close by the end of 2020 following nearly forty years of production. "One Lifetime, One Encounter" is an auction event, offering a collection of the rarest diamonds extracted there over a year's production.
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.
A well-organized compilation of 10 beautiful Graff creations, splendidly set to music. Settle in for 13 minutes and 13 seconds of glorious, uplifting creations from the masters at Graff.
This 10+ carat HPHT produced lab-grown diamond was initially graded Fancy Intense Yellow by IGI. When it returned to the lab its color had been changed to Fancy Vivid Pink. IGI confirmed that the color had been shifted from yellow to pink through irradiation using a 5MeV Electron Beam Transfer system.