I'd like to buy a Tacori ring from a local retailer in my town, but I'd like to get the center stone from an internet retailer to get the best price/quality. Is this possible--will a local retailer normally take a diamond from you when you have chosen not to buy the center stone from them? How does this normally work? Do they send your stone off to Tacori and bear responsibility for it? Maybe these questions are basic, but I'm new to this. Thanks for your help!