Quartz makes an excellent gemstone. It is hard, durable, and usually accepts a brilliant polish. Popular varieties of quartz that are widely used as gems include amethyst, citrine, rose quartz, smoky quartz, and aventurine. Agate and jasper are also varieties of quartz with a microcrystalline structure.
From Jewelry making and gemstones, for its ability to luster, to brick making in the refractory industry for its physical strength and to watches and clocks for its piezoelectric property, quartz finds uses in a wide range of industries