Clear quartz is a powerful crystal with a restorative and amplifying energy. Because it's often used with other stones to strengthen their effects, it's a great addition to crystal grids. Clear quartz is best for all chakras to clear and activate them, and it can be used to purify the physical and energetic bodies.
One of clear quartz's benefits is enhancing mental clarity. It can help with emotional stability, and it's popular in meditation and restorative work. It’s also often used for manifestation and can help create more focus and clarity around a desire. It is a protective stone and can be used to amplify psychic abilities. It also can be helpful in seeing the truth of a situation, as well as in understanding ourselves and seeing situations from a new perspective.
It’s important to charge your crystals regularly to maintain their benefits. You can cleanse and charge clear quartz by placing it under moonlight or soaking it in water. (*taken from thespruce.com)