Hands down the #1 question Im asked online is "How can I tell if my diamond is the real thing?" People want to know if there is some simple test they can do at home or little tricks of the trade to tell if the ring they own is a valuable heirloom or of the Cracker Jack variety.
Without question the quickest and most reliable method for authenticity would be an independent appraisal. This can be accomplished easily enough by looking under "Appraisal (Jewelry)" in your yellow pages. When you call to enquire about their services you want to ask three questions:
1.) Can you schedule an appointment or is it first come first served.