Opals
By: Eric Ethan
Series: Gems, nature's jewels
Publisher: Gareth Stevens Pub.
Published: 2012
Place of publication: New York
Language: eng
ISBN-13: 9781433947230; 9781433947247
Notes: Includes index.
Table of contents: title: What are opals?; title: Where are opals found?; title: What do opals looks like?; title: Finding a gem; title: Making opal jewelry; title: What makes opals valuable?; title: Really rare opals.