(My personal favorite)
Garnets

Garnets have been treasured for thousands of years, truly one of the world's most ancient gems. In their natural form, garnets are in a seed-like crystal formation. In the 13th century Garnets were worn to repel insects. This lovely red stone is thought to cure fever, promote good health, relieve skin conditions and regulate the heart and blood. The Asiatic tribes believed that these blood red stones were more deadly than lead bullets and used them in place of bullets. They are also believed to protect one from muggers and thieves.