http://pagan-supplies.com/dowsing%20pendulums.htm.php
A really nice top quality lathed brass pendulum.
This is a top quality brass pendulum turned on a lathe and not cast like cheap massed produced ones.
It weighs 32g grams. The base unscrews to access the witness chamber. Water or other samples can be put in the witness chamber to aid with dowsing for the required mineral, water or whatever is being sought.
http://pagan-supplies.com/dowsing%20pendulums.htm.php