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 retailer's official holiday shopping event will run from Nov. 29 to Dec. 2. Here's what shoppers need to know for saving ...

is suing Costco for allegedly marketing ... to observe that Costco was offering for sale what were promoted on in-store signs as Tiffany diamond engagement rings,” Somaiya reported.