The quartz stone family is extremely large and varied. Some of the more famous members include amethyst (purple quartz), citrine(yellow quartz), smoky quartz (black), rutilated quartz (quartzes with other minerals growing inside them), as well as all the various agates and jaspers. Quartz may be found worldwide including many Canadian locations. Clear or white Quartz is often found in crystal form and is the most often sought after for its healing or crystal properties. Girasol Quartz milky color and optical phenomena are both produced by light scattering off the microscopic fibers within it.