Buy Natural Original Opal ( (Doodhiya patthar) ) for sale online 12.57 carats ( 13.81 Ratti). The Stone origin ( where it is mined ) is Australia . Opal is a white coloured semi-precious gemstone of the silicate mineral family. Opal works miraculously for the ascendant's of Venus (Shukra) Planet. Natural Opal can be worn by people seeking benefits in Career, Marriage & Health & Luxury. The major sources of Opal are Australia & Ethiopia.