Boji Stone refers to concretion stones which are found in Colorado. Boji stones are usually round with some protrusion of platelets. These stones are a composite of palladium and pyrite. Boji stones are a 7 on the Mohs scale. Boji stones come in male, female and androgynous forms and in various sizes, generally from the size of a dime to as about as large as a silver dollar. The male stone is characterized primarily by the uneven, sharp, protruding patterns on their surface. Boji stones are thought to balance magnetic polarity within the body.