a twinkling ring with a rainbow-coloured 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 brilliant adamant.

It is a twinkling ring with a rainbow-coloured gem.
It weighs a few ounces.

You identify a twinkling ring with a rainbow-coloured gem.
It is an anti-summoning object. It is efficient against long range spells.
It weighs four ounces, and it is worth about fifty-eight gold, two silver, and fifty copper.
Its keywords are ring, twinkling, rainbow-ring, rainbow-coloured, and rainbow.