Judge Refuses to Block Zale Diamond Ads

A federal judge in Ohio refused to block Zale Corp. from using an advertising campaign that touts the superior brightness of its diamonds, over the objections of a rival jewelry chain. Sterling Jewelers Inc., a unit of Signet Jewelers, filed a lawsuit in November accusing Zale of false advertising in claiming that its Celebration Fire stones are the “most brilliant diamonds in the world.” Sterling, based in Akron, Ohio, said its tests found that its own diamonds are as glittery as those sold at Zale’s.