Natural quartz is a mineral formed deep in the Earth’s crust over millions of years. It is one of the most abundant and hardest minerals on the planet. In geology, pure quartz appears as clear or milky crystals, but when combined with other minerals it can take on many colors and forms (e.g., amethyst, rose quartz). ???? In stone form (quartzite) Quartzite is a natural stone com... https://alexpar091.timeblog.net/75359688/natural-quartz-a-durable-and-elegant-natural-stone