A crystal ball

(Wicca) The ceremonial use of crystals for specific intentions and healing energies

A census-designated place in Washoe County, Nevada, United States.

Someone who claims to be able to see the future by gazing into a crystal ball. / (figuratively) Someone who makes predictions about the future, especially when these are seen as speculative.

The action or practice of gazing into a crystal ball in the hope or belief of seeing the future.

A periodic nanostructure that exhibit periodicity in its structure that results in bandgaps where energy cannot propagate, as well as negative refraction that can be exploited for wave focusing.

a crystal which exhibits a spontaneous electric dipole moment

(electronics) A small crystal of quartz accurately cut in certain directions so that it can be vibrated at a particular frequency, to produce an electric signal of constant known frequency.

a clock which is regulated by a quartz crystal

plural of liquid crystal display