Crystal healing

Crystal healing is a pseudoscientific alternative-medicine practice that uses semiprecious stones and crystals such as quartz, agate, amethyst or opal. Adherents of the practice claim that these have healing powers, but there is no scientific basis for this claim. Practitioners of crystal healing believe they can boost low energy, prevent bad energy, release blocked energy, and transform a body's aura.

Believers in crystal healing engage in various physical activities with crystals, typically involving holding, wearing, placing or meditating with the stones. While the practice is popular, it fosters commercial demand for crystals, which can result in environmental damage and exploitative child labor to mine the crystals. Some popular crystals used by believers such as shungite frequently contain heavy metals and present toxicity risks to those handling them for extended periods or ingesting substances which were in contact with the crystals.