a silver cloakpin

This is a smallish, round piece of solid metal, that shines like silver but is heavier and stronger. The oval-shaped pin has been cleverly crafted to securely fasten a cloak of almost any size.

It is a silver cloakpin.
It is made of silver.
It weighs half a pound.

You identify a silver cloakpin.
It weighs eleven ounces, and it is worth about four lauren.
Its keywords are cloakpin, silver, and pin.