From personal experience I do believe crystals have a beneficial effect on ones energies. Why do we today have gem stones inlaid in gold and silver ?
Ancient civilisations, the Celts, the druids, and very much so today in the eastern cultures all utilize the properties of crystals.

Particular stones relate directly to the 12 months of the year, to the signs of the zodiac and to the ten planets. Correct choice is said to bring fortune, as is the use of the stone which is closely associated with the power of a particular planet you wish to invoke. On a psychic level I can advise you what type of crystal will benefit you most.