The stone symbolized success and good fortune, and often was worn as a love charm. To tell the time, a turquoise was suspended by a string inside a glass, against which it would strike the hours. In the Native American cultures of the Navajo and the Pueblo, turquoise is a very sacred stone. The Navajos used ground turquoise and coral in paintings to summon rain for crops. The Pueblos placed turquoise under the kiva, or gathering house, when it was being constructed as an offering to deities. It was also an extremely common tool for shamans in their medicine pouches. Other southwestern tribes of North America used it in cemetaries and tombs to guard the dead. According to some legends, turquoise originates in the wet earth at the end of the rainbow.