The barite rosette or "rose rock" has been the state rock of Oklahoma since House Bill 1277 was approved by the Oklahoma Legislature on April 8, 1968, and was signed into law by Gov. Dewey F. Bartlett. Rose rocks are found in central Oklahoma, although barite deposits also occur in the Wichita and Ouachita mountains. Similar rosettes occur in Kansas, California, and Egypt. The rose rock is an aggregate of barite and sand formed like a fully bloomed rose, with five to twenty radiating plates or blades that appear as the petals.