These pendulums are great Natural Amethyst pieces in deep purple.
An Amethyst Crystal Pendulum, suspended on a chain is sometimes used in divination and dowsing, the user determines which direction (left-right, up-down) will indicate "yes" and which "no" before proceeding to ask the pendulum specific questions. In the practice of Radiesthesia, a pendulum is used for medical diagnosis.
Each Pendulum is individually made, so they differ a little in size and shape. The photograph shows a representative example.
Approximate size: 40mm x 20mm.
Mineral Species - Amethyst