When you think of where to buy your engagement ring, you might think of Zales, Tiffany & Co., or Blue Nile. But if you've ever walked past the diamond counters at a Costco warehouse, you might be ...

The savings run deep at Costco -- perhaps deeper than you've ever thought. Check out some of the wildest items you can buy ...

is suing Costco for allegedly marketing engagement ... for sale what were promoted on in-store signs as Tiffany diamond engagement rings,” Somaiya reported. Tiffany said in the lawsuit that ...