This is an secondhand pendant necklace from Accessorize.  The necklace is set on bronze tone metallic chain, with an oval shaped abalone shell pendant.

It has a lobster claw clasp.  

It is used in good condition with some minor wear/tarnish.

The necklace is approximately 90 cm in circumference including the extender, or 85 cm excluding the extender.  

The abalone shell pendant is approximately 4.5 cm in length.