Merlinite is also known as Dendritic Agate.  It is an intrusive igneous rock , consisting of white quartz with black and grey  tree like dendrites of psilomelane.

This elongated oval Merlinite pendant comes with an 18 inch silver chain. 

It is one of the birthstones for Aquarius . Said to improve intuition, promote prosperity and stabilize the nervous system

Middle pendant weight:         8.2 grams    Stone size: 4cm x 2cm