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 ...

Any time you walk into Costco, you are guaranteed low prices on almost every item in the warehouse. One of the most incredible things about the company is its continually lowering prices on ...

Costco is best known for its bargains, but it sells a lot more than bulk toilet paper.

Oura announced its placing its Ring 4 on Costco's website, expanding its coverage for consumers looking to strive for better health goals. The company says the ring is available today (Mar. 19) for ...

Costco is going to have to pay for selling "Tiffany" engagement rings that weren't made by the famed company. A judge has ruled that the jewelry company is entitled to almost 20 million dollars.

A federal jury told Costco to pay Tiffany and Co. $5.5 million in compensation for selling counterfeit Tiffany diamond engagement rings. Last year, a district judge ruled that Costco had knowingly ...