This is the one and only original 'Star of Kahless' that was used in the Star Trek: Deep Space Nine episode 'When It Rains'. The item was first ritually bled upon by the character of Gowron and then presented to Martok who wore it in subsequent scenes. The Star itself is a type of resin and the chain, I am told, is vintage/antique (it is not damaged, it looks kinked because a couple of the loops are out of alignment and getting them back is a bit of a puzzle).
A couple of screen-caps have been provided for reference.
