Czech Republic, Slovakia,Hungary,Turkey,Indonesia,Brazil,Australia and Mexico.
Not surprisingly, given how much opal has been found in Australia, the stone makes a number of appearances in aboriginal lore, and opal outcrops are considered sacred places by the Australian aborigines. It is connected with several stories from the Dreamtime, often related to stories of the first rainbow.  A high percentage of the opal found there occurs in thin layers. Other significant deposits of precious opal around the world can be found in the Czech Republic, Slovakia, Hungary, Turkey, Indonesia, Brazil (in Pedro II, Piaui), Piauí Honduras-Erandique Lempira Lempira, Department guatemala And. nicaragua The internal structure of precious opal makes it diffract light; depending on the conditions in which it formed, it can take on many colors. Precious opal ranges from clear through white, gray, red, orange, yellow, green, blue, magenta, rose, pink, slate, olive, brown, and black. Lampropeltis getula. The word Opal comes from the Latin word opalus, which means precious stone. Opal is a form of noncrystalline quartz which is created from circulating, silica-bearing waters. When the silica solidifies it creates the gemstone Opal which contains approximately 6 to 10 percent water. Simulants are man-made stones which are similar to Opal but made from a different material. Fire Opal is minded in Mexico and Honduras, and several varieties of Precious Opal are found in India, New Zealand and the deserts of the western US. 3. More than 90% of the world's precious opals come from Australia, and the rest can be found in other parts of the world such as Mexico, Brazil, Indonesia, Czech Republic, Ethiopia and USA. Opals from Mexico (called Mexican Opal) has more water and is transparent or extremely translucent. BASIC 2. More than 90% of the world's precious opals come from Australia, and the rest can be found in other parts of the world such as Mexico, Brazil, Indonesia, Czech Republic, Ethiopia and USA. Found in 1956 at the Eight Mile opal field in Coober Pedy, South Australia, it was found a … t a depth of 30 feet and so named because the Olympic Games were being held in Melbourne at the time.   The Olympic Australis consists of 99% gem opal, with the remainder of 1% being the soil still attached to the stone.  Peruvian opal (also called blue opal) is a semiopaque to opaque blue-green stone found in Peru, which is often cut to include the matrix in the more opaque stones. It does not display pleochroism. Blue opal also comes from Oregon in the Owhyee region, as well as from Nevada around Virgin Valley. The internal structure of precious opal makes it diffract light; depending on the conditions in which it formed, it can take on many colors. Precious opal ranges from clear through white, gray, red, orange, yellow, green, blue, magenta, rose, pink, slate, olive, brown, and black. The Olympic Australis Opal is believed to be the largest gem opal ever found.   Found in 1956 at the Eight Mile opal field in Coober Pedy, South Australia, it was found a … t a depth of 30 feet and so named because the Olympic Games were being held in Melbourne at the time.   The Olympic Australis consists of 99% gem opal, with the remainder of 1% being the soil still attached to the stone. It weighs 17,000 carats (3450 grams) and is 280 mm long (11 inches) by 120 mm, by 115 mm. Other significant deposits of precious opal around the world can be found in the Czech Republic, Slovakia, Hungary, Turkey, Indonesia, Brazil (in Pedro II, Piaui), Piauí Honduras-Erandique Lempira Lempira, Department guatemala And. Nicaragua in late, 2008 nasa announced it had discovered opal deposits On. mars The internal structure of precious opal makes it diffract light; depending on the conditions in which it formed, it can take on many colors. Precious opal ranges from clear through white, gray, red, orange, yellow, green, blue, magenta, rose, pink, slate, olive, brown, and black.
http://earthandstars.org/articles/terra/opal/ https://en.wikipedia.org/wiki/Opal http://www.desertusa.com/desert-minerals/opal-gemstone.html http://www.gemstory.com.au/basic2-types-of-australian-opal.html http://www.answers.com/Q/Where_can_opal_be_found https://en.wikipedia.org/wiki/Opal http://www.answers.com/Q/Where_can_opals_be_found https://en.wikipedia.org/wiki/Opal
where can the opal stone be found