Chalcedony has a waxy luster, and may be semitransparent or translucent. The gem is mined in various parts of the world including Brazil, Madagascar, and Sri Lanka, and is usually located in volcanic and sedimentary rocks.
It is believed that chalcedony was one of the earliest materials used by man. Not only is the stone named as one of the twelve gems in the breastplate of Aaron, there is reference to its use in creating the foundation of the city walls of the 'New Jerusalem'.
Chalcedony is a nurturing stone that promotes tranquility and good will. It absorbs negative energy and promotes harmony of the mind, body, emotions, and spirit. It is also said to stimulate creativity.