a bronze ring with a lustrous blue gem

The ring is round and perfectly shaped to fit around a finger. Only a small marking can be found on the inside of the ring, a signature of the silversmith that forged it. The top of the ring features a square, silver setting with room for a gem. The ring has been embedded with a lustrous opal.

It is a bronze ring with a lustrous blue gem.
It weighs a few ounces.

You identify a bronze ring with a lustrous blue gem.
It is an anti-summoning object. It is efficient against long range spells.
It weighs three ounces, and it is worth about eleven gold and five silver.
Its keywords are ring, bronze, lustrousblue-ring, lustrous, and blue.