Pendulums are wonderful tools to using to obtain answers to YES and NO questions. They can also be used for dowsing.
 

ACTIVATES CROWN CHAKRA ~ MEDITATION STONE ~ Phenacite is a third eye stone and considered to be one of the most powerful! In addition to being able to activate the 3rd eye, this stone can also activate the crown chakra and the lightbody. This stone can instantely clean your aura. Phenacite can be used to help communicate with spirit guides, angelic beings, and other high vibrating beings. It is an excellent meditation stone and strongly activates your intuitive and psychic abilities. Phenacite is also considered a powerful manifesting tool.
 

PROTECTION ~ Pyrite is a powerful protection stone. Enhances intelligence, mental stability, logic, analysis, creativity, memory, and psychic development . Taps your own latent mental talents and abilities. Pyrite is very grounding. Pyrite is also known as Fool's Gold and Healer's Gold. Pyrite strengthens the auric field and is a wonderful ally when spending long hours at a computer. Strengthens the abdominal organs, aids in the digestion and metabolism of nutrients.