a glittering pendant

Over a hundred small rings have been linked together form a chained necklace with a small hook clasp on one side, and a pendant on the other end. On examining the chain further, it appears to be quite sturdy despite its rather diminuitive size. The pendant is shaped like a teardrop and has room for a gem to be mounted.

It is a glittering pendant.
It weighs a few ounces.

You identify a glittering pendant.
It is an anti-summoning object. It is efficient against long range spells.
It weighs five ounces, and it is worth about twelve gold and five silver.
Its keywords are pendant and glittering.