Carnelian: 

A glassy, translucent stone, Carnelian is an orange-colored variety of Chalcedony, a mineral of the Quartz family. Its color varies from pale pinkish-orange to a deep rusty brown, though it is most known for its brilliant orange and red-orange crystals. Its name comes from a Latin word meaning “flesh.”

In antiquity, as well as today, Carnelian is believed to help timid speakers become both eloquent and bold. Ancient Warriors wore Carnelian around their neck for courage and physical power to conquer their enemies. In Egypt it was worn by master architects to show their rank of builder, and alchemists of the Middle Ages used it as a boiling stone to activate the energy of other Chalcedonies. As the first stone in the breastplate of the High Priest, it signified the blood of the martyrs, and was once believed to prevent illness and the Plague.