Yes, it is possible to buy a single earring from Tiffany & Co. , but generally only as a for one you have already lost from a set . How to Get a Single Replacement Earring
You should reach out to Customer Relations at 800-464-5000 or visit a local Tiffany store .
If you aren't replacing a lost item and simply want one for a single piercing or a stack, you can find authentic pre-owned single earrings on secondary markets:
Are you looking to replace a you lost, or are you just interested in buying a single piece for a new style ?
Often stocks single Tiffany earrings ranging from roughly $80 to over $6,000.