a ring with a translucent 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 star sapphire.

It is a ring with a translucent blue gem.
It weighs a couple of ounces.

You identify a ring with a translucent blue gem.
It is an anti-summoning object. It is efficient against long range spells.
It weighs two ounces, and it is worth about 42 lauren and ten celeb.
Its keywords are ring, translucentblue-ring, blue, and translucent.