The most common quartz, this colourless, transparent gemstone has a quiet beauty. We're told our stock is natural, but we think now and then we've gotten some lab-grown quartz, which is identical to the type found growing in nature. Rock crystal quartz is considered by many to be the best all-purpose crystal. It is reputed to cleanse the mind and body, strengthen alignment with higher self, enhance properties of other gemstones, amplify energies and give strength. It is also said to lessen negativity and remove toxins.