Black Obsidian Pendulum (8 sides) - from Mexico.
(Picture is example only | Please allow for some natural variation in size, shape, and colour/hue.)
Black obsidian is a very powerful and protective Stone. It grounds the soul and spiritual forces into the physical plane, bringing them under the direction of the conscious will. Self-control is increased with this stone. Also, this stone has a good action to cut ties, to break negative attachments to people with whom you have been close.
Chakra: Root - Zodiac: Scorpio