eh, I''m not sure. . .I think that if you were to buy locally and if, as DF says, they''re IGI, you''re better buying from there and saving money than buying from another place. I looked at Jareds today and they had an IGI F I1 and it was $1500! Crazy. That didn''t even include the setting.
Costco has a ‘special order’ jewelry department that is, in effect, buying from one of the drop-ship style Internet vendors. They can get you pretty much any stone you want with a few days notice including both GIA and AGS graded stones. There’s usually a stack of brochures promoting it near the jewelry display in the warehouse. The vendor will ship it to whatever warehouse you like and you pick it up and pay for it there.