update - SHOICKING!
Yes - my ring has a GIA cert. It was from the year 2004. The stone table is a 7.2. That is on a 1.25 carat. "I" color, VS1. It cost $7990 for just the stone. Jewelery store has a buy back program. They claim to give you back exactly what you paid for the diamond. Obviously not the current price a diamond with those specs would cost 10 years later. The jeweler showed me a 1.50 stone with a 7.4 table and exact specs. I could see no difference whatsoever between my original with the 7.2 table and the bigger 7.4 table.
Here is the clincher: It would cost $11, 000 more! But he'd give me a nice discount and would only be $9,000 more! LOL! Can't even see any difference between 2 stones.
I was contemplating if I only had to add $4000 or $5000. So I ran out of the store as fast as I could. BTW, my stone looks bigger anyway since it was reset into a HOF significance style halo in year 2010.
So now instead of an upgrade, I am exploring (revisiting ) tennis bracelets for my birthday present in the $4,000-$5,000 range.