A Lakota (Sioux) "peace pipe" pipestem, without the pipe itself, displayed at the United States Library of Congress A peace pipe, also called a calumet or medicine pipe, is a ceremonial smoking pipe used by many Native American tribes, traditionally as a token of peace. A common material[citation needed] for calumet pipe bowls is red pipestone or catlinite, a fine-grained easily-worked stone of a rich red color of the Coteau des Prairies, west of the Big Stone Lake in South Dakota. The quarries were formerly neutral ground among warring tribes; many sacred traditions are associated with the locality. A common misconception[citation needed] of the peace pipe is what, exactly, was in it. The most common and sacred things smoked out of the pipe was Tobacco. Tobacco was sacred to the many different Native American tribes. A prayer would be said to each of the four directions as well as mother earth and father sky as they filled the pipe. After filling the pipe, some tobacco would be sprinkled on the ground. To show respect smoke would be blown into one's face[citation needed]. Captives would at times take this the wrong way[citation needed], but it was actually a sign of kindness or respect.