An octagonal amulet - amulet555

Probe

An octagonal amulet weighs one pound.
It has a basic merchant value of 0 pieces of gold.
An octagonal amulet has not been set with any gold coin value.
It cannot be owned.

Examine

The octagonal amulet is forged from the finest star-silver, and is no doubt worth much in gold. However, it exudes a strange magic, and you guess it serves a secret purpose.

Quest