Swarovski 2000s Necklace

Swarovski crystal necklace from around 2003 to 2004 (received as a gift). chain length is 15 inches, fits a bit longer than a choker, as shown in the photo silver color with a crystal pendant. I'm not sure exactly what material the chain is, as I can't find visible markings. Original Swarovski swan logo on the chain by the clasp! a bit tarnished on the clasp, though I didn't have the right materials to try to clean it myself.