(IDEX Online) - Signet remains by far the biggest-grossing jeweler in North America, according to National Jeweler magazine's annual State of the Majors report on $100m supersellers published yesterday.Total sales of watches and jewelry at its 2,854 outlets and online were $7.29bn during 2022 - more than double the revenue of second-placed Walmart ($3.38bn).Richemont, the Swiss luxury conglomerate jumps from sixth place last year to third, with sales up over 20 per cent to $3.37bn.Amazon, Costco and Macy's - listed in third, fourth and fifth place last year - all slip down the rankings to fourth, sixth and seventh place respectively, despite increased revenues.Pandora slips from seventh to ninth place. LVMH, Nonatum and Bucherer all move up.A total of 36 retailers - down two on last year - were assessed as having sales of $100m or more in North America by researchers for the magazine, based on the most recent available figures.Pic shows a Zales store, part of the Signet empire