Bloodshot Iolite. Known as the gemstone of the Vikings, Iolite was used by Norse and Viking explorers as a navigational aid, as a properly oriented stone would change color in relation to the direction of sunlight, allowing for crude navigation in the fog- enshrouded northern Atlantic waters where the direction of the sun was otherwise impossible to discern.
Cullinan I, the First or Greater Star of Africa The largest diamond is Cullinan I. Weighing in at 530.2 carats, it measures 2 1/8” long, 1 ¾” wide, and 1” thick at its deepest part. It was cut and polished by Asscher's into a pear shape with 76 facets, and is the largest colorless cut diamond in the world.