There are many categories of crystals, gems and stones, those with higher frequencies and we like to call them Buy now Crystals with universal frequencies and those vibrating earth frequencies, from the ground, the soil of the Earth and we like to call them earth grounding stones. Most of them have both physical and metaphysical meanings and use and for healing purposes can influence moods, vibrations, emotions and as such re-energize, dissipate low frequencies, absorb negativity, transform energy into positive and many more.