Review the style of the bracelet. The authentic Tiffany teardrop bracelet is made of sterling silver -- the favorite material of Tiffany & Co. -- at 7 inches in length. It features five hanging teardrop-shaped sterling silver charms and a silver spring ring clasp. If you notice there's an incorrect number of charms, or they're not silver, it's not authentic.
Look at the quality of the bracelet. Tiffany, as one of the most well-known high-end jewelry brands in the world, would never sell a bracelet -- or any other piece of jewelry, for that matter -- that wasn't of the utmost quality. Tiffany bracelets are flawless, so look for any tarnishing of the metal, breaks in the chain, and consider the quality of the clasp. Open and close the clasp a few times to ensure it works properly; any of these issues arise, and you're dealing with a cheap wannabe.
Feel the weight of the bracelet. It's a rather slender piece, so it's not going to weigh a ton, but you will notice that it has some weight to it when you hold it in your hand. If it feels lightweight like plastic, it's probably just plated metal, not pure sterling silver like the genuine Tiffany teardrop bracelet.
Find out the price of the bracelet in question. Because the real Tiffany teardrop bracelet is a top-quality, pure metal piece of jewelry, it comes with a suitable price tag -- $118 regular retail price. Find a bracelet that seems to be the Tiffany version by appearance, but which sells for $30, and don't get your hopes up that your uber-smart shopping sense just scored you a great deal, 'cause it's probably a fake.
Check out the packaging that comes with the bracelet. Tiffany jewelry always comes packaged in the brand's signature turquoise green color of boxes, with the same color of velvet lining the inside.