Neal Goldberg, the chief executive of the Zale Corporation, spoke the company’s plans for the holiday season and beyond.

Manufactured diamonds have become indistinguishable from their natural counterparts.

Diane Irvine is the chief executive of Blue Nile, an online diamond retailer.

Tiffany & Company reported that strong growth in Asia-Pacific and European markets helped first-quarter profit rise 19 percent.

A Web site allows users to sell, auction, trade or simply give away the refuse of their amorous misadventures. But they also have to tell the stories behind the gifts.