If we're talking luxury, let's really talk luxury, because seriously, Costco sells diamonds! We're talking engagement rings, necklaces, earrings, and more. All of Costco's gems are GIA-certified, too.

We all have our guilty pleasure purchases, whether that’s indulgent chocolates, a new piece of jewelry or a luxury perfume. While none of these items are worth blowing your budget for, if you can ...