Also known as water sapphire and Vikings' compass, (because of it's ability to determine the direction of the sun on overcast days) Iolite, is a transparent, violet-blue, light blue, or yellow-grey mineral. A pleochroic stone, Iolite will show many colors in a single stone.
Iolite is a popular and interesting gemstone. It has a pretty violet blue color that is unlike other gemstones, although it has been compared to a light blue sapphire. It is for this reason that it is sometimes known as "water sapphire".
Although the color is attractive and popular it is not extremely rare and is therefore quite affordable, making Iolite jewelry more and more popular in recent times. While an Iolite necklace or Iolite earrings are probably the best way to showcase this gem stones' unique color, as well as Iolite rings