You don't know what you're getting until you get it. Their return policy is amazing though. That being said, my engagement ring diamond wasn't PERFECT proportions but close enough to keep it. They guarantee minimum I color and VS2. Mine is I VS1 and a bit shallow cut but faces up big (6.5mm for 1.0 ct). Mine was purchased online (in Canada).
Which lab grades their stones?
Check out this thread:
Show me your Costco diamonds.
So many people on this thread have gorgeous jewelry they purchased from Costco. I would love to see more.www.pricescope.com