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
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.
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.
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.
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.