by NationalGeographic (Author), RobWaring (Author)
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? What does it take to find them?
Format: Paperback
Pages: 24
Publisher: Heinle-Cengage ELT
Published: 01 Oct 2008
ISBN 10: 1424012015
ISBN 13: 9781424012015