In mid-2018, Edahn Golan, a longtime diamond industry analyst, began publishing a quarterly lab-grown diamond price list charting wholesale transactions. His timing was spot-on—2018 was a watershed year for the nascent lab-grown category. Lightbox, De Beers’ lab-grown diamond subsidiary, made its debut at JCK Las Vegas that May, just as the industry’s retail gatekeepers indicated they were finally willing to give lab-created diamonds a chance.