Amethyst is given as a symbol of sincerity, security, and peace of mind. It is also thought to magnify psychic abilities and right-brain activity, energize and purify the blood, relieve headaches, improve blood sugar imbalance and strengthen immunity.
Iolite is known as the Vikings compass due to it's ability to determine the direction of the sun on overcast days. When the legendary Viking mariners sailed the wide ocean, they used thin pieces of iolite as the world's first polarizing filter. Looking through an iolite lens, they could determine the exact position of the sun, and navigate safely.