Автор:Waring Rob Год: 2008 Издание:Heinle/Cengage Learn Страниц: [не указано] ISBN: 9781424011049 People from around the world travel to Coober Pedy, Australia, with hopes of getting rich. This town is full of valuable stones called opals. Some opals are worth millions, but they are extremely hard to find. What influences the value of an opal?...
