Can a diamond ring be re-sized to several sizes up or down?
I'm thinking of buying a diamond ring for my girlfriend, but most diamond rings are standard at 7 - 8 ring size (US). Her ring size is 10 - 10.5. I don't know why, it just is. I was wondering if I could purchase a ring from Zales or this BJ Wholesale that I found nice rings that are size 7 or 8. Now, I've heard from Zales that they can re-size a ring, but I wasn't sure if they could re-size from 7 to 10.5. Anyone?
Here are the rings I'm considering.
http://zales.imageg.net/graphics/product_images/pZALE1-2745285_alternate2_t400.jpg
http://zales.imageg.net/graphics/product_images/pZALE1-2220764_alternate1_t400.jpg
http://content.vcommerce.com/products/602/71604602/fullsize.jpg?-784757063
http://content.vcommerce.com/products/610/71604610/fullsize.jpg?-784768615