Because it has both projective and receptive energies, boulder opal is a powerful stone on the metaphysical level. Representing purity and intensity, it fosters creativity and originality and aids inner beauty. Associated with peace and consciousness, it helps balance the emotions.

Assisting with both verbal and extrasensory communications, boulder opal stone is useful in recalling past lives, as well as helping a person communicate with spirit guides, angels, and beings of unknown origin. Helping one connect with the conscious and subconscious, boulder opal can also help provide a clearer understanding of oneself.

On the physical side, boulder opal helps to improve eyesight. It also stimulates the pineal and pituitary glands, balances the metabolism and increases the assimilation of protein.