What is this incredibly beautiful blue crystal? This is quartz - one of the most common minerals, which impresses with its attractiveness. Sky blue quartz is used to create a variety of jewelry, glass, dishes, or vases. Crystals of blue color are the rarest type of quartz, which is why its properties and energy are considered the most unique. Also, this stone has a good effect on human health. The beautiful Quartz Crystal cursor and Blue pointer!