Psychic Mediums are known for crystal balls. I have several, not to gaze in to see the future, because many are beautiful that carry the healing properties of the crystal.
 
Metaphysical Properties
A beautiful semi precious gemstone having close resemblance with the eyes of a cat in its appearance, is also known as Lahsuniya in Vedic astrology. It is a stone that represents discipline, concentration, and learning ability in its wearer. Cat's Eye acts to stimulate intuition and to enhance awareness. It is a grounding stone that provides a very effective protective energy. Cat's Eye dispels unwanted energy from the aura. It amplifies good luck and fortune and transforms negative thoughts into positive energy into
happiness and serenity, along with optimism, generosity and confidence. It can enhance creativity and kindness.