Quartz is the name given to a large family of stones and crystals, all of which are made up primarily of silicon dioxide: one of the most common substances on Earth. Quartz crystals are generally six-sided and can be found in all shades and colors. Quartz crystals grow singularly or in clusters, forming geodes and different shapes according to the temperature at the time of their formation. Quartz crystals can also contain other minerals within them like rutilated and tourmalinated quartz. Quartz can be formed of microscopic crystals and take on entirely different appearances and qualities.
Its family includes the classic clear crystals that are what many people picture when they hear the word “crystal,” but also such gems as agate, amethyst, ametrine, aventurine, carnelian, chalcedony, citrine, rose quartz and smoky quartz, just to name a few.
Quartz is mined all over the world in its many forms. Its Mohs hardness is 7, and it has a trigonal structure.
Metaphysical: Quartz is commonly used to dispel negativity and clear away negative energy. A stone of clarity it can be used to purify and clarify on the spiritual, mental as well as the physical planes. One of the most protective gemstones, quartz will protect the spirit as it enhances spiritual grown, and wisdom. Clear quartz is associated with the crown chakra, but also works effectively to balance and energize all chakras. It is held to be the stone of Scorpio and the mystical birthstone for October.