Discover the captivating world of opal through a curated collection of classic gemological and crystallographic articles. This engaging volume brings together historical insights on the origins, structure and physical properties of opal, making complex subject matter accessible and fascinating for both newcomers and seasoned gemstone enthusiasts. Contents include: Precious Opal by Hodder M. Westropp - The Opal by Edwin W. Streeter - Opal by Lewis E. Aubury - Opal by Michael Weinstein - Opal by Herbert P. Whitlock - Opal by G. F. Herbert - Opal by Edward Henry Kraus - Opal by Kathleen Gough - Opal by Marcus Baerwald Opal Gemstones offers a unique blend of science and history that illuminates what makes opal one of the most intriguing gemstones.