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 lawsuit claims Costco sold engagement rings in stores ... sale what were promoted on in-store signs as Tiffany diamond engagement rings,” Somaiya reported. Tiffany said in the lawsuit ...