Chalcedony is a form of microcrystalline quartz, which in its natural state is waxy or dull. Chalcedony is commonly referred to those specimens that are a bluish white-grey. It can also be used to describe those that are a yellow to a deep orange, purple, pink or red. Chalcedony sometimes can be confused with Tanzanite. Petrified wood and bone is made out of chalcedony.
Chalcedony is found in Brazil, India, Madagascar, Sri Lanka, and California. It was one of the first raw materials used by early man. Knives, tools and spear/arrow tips were made out of chalcedony. Some say that Chalcedony can be used to help relieve depression, fear, hysteria and touchiness. It is also said to reduce fever and help eyesight