Iolite
commemorates the 21st wedding anniversary. Ancient sailors believed that iolite
had the power to return them to land when lost and navigate at sea. Iolite is
a very unusual stone, its primary color is a purplish blue, and the name iolite
is derived from the Greek word for violet.
Iolite is a member of the iolite mineral group. Iolite has a hardness of 7 - 7.5 and a specific gravity of 2.61. Iolite is found in Sri Lanka, India, Tanzania, Brazil, Madagascar, Namibia and Mynomar.