The October birthstone’s dramatic play-of-color has inspired writers to compare it to fireworks, galaxies and volcanoes.
Ranges from 5 to 6.5 on the Mohs Scale
The opal birthstone can be found in many places. The fields of Australia are the most productive in the world for the October birthstone. Ethiopia, Mexico and Brazil are also important sources. Additional deposits have been found in Central Europe, Honduras, Indonesia, Madagascar, Peru, Turkey and the United States.
Tourmaline is the newer October birthstone.