It's a thick-ish (well, not "bling bling" thick, but definitely bigger than most gold necklaces found in department stores) gold chain with a gold pendant hanging on it. It has my chinese zodiac sign on one side and a chinese word meaning luck/prosperity/etc on the other. It's traditional/customary for chinese men to wear this (women wear a jade pendant, usually on a red string).
-Eric
Edit: I got it when I started HS...havent' taken it off since.
Edit2: Forgot to mention...the links are shaped like little fishes...very intricate. Kind of neat I guess...girls like it a lot...heh.