Quartz is one of the most common stones in the world. They are thought to be Divine reincarnations gifted to us from Mother Earth, and as such are imbued with vast healing properties.
I personally think that everyone can benefit from having some Quartz in their life, as this stone is commonly used as an amplifier. For example, if you’re doing a healing ritual, Quartz will lend energy to bring about greater healing. It’s also very good for storing and removing energy. One thing I’ve heard some of my friends do is charge their Quartz under the full moon. That energy can be used for a later time. If you have a Tarot deck, keeping a piece a Quartz with it will help clear it of energy after readings.