This publication is a compilation of the Australian Gemstones Series Book 5 to 9. Each book covers varying aspects relating to gemstones and organic materials. Included are the following titles: - Book 5 Identification of Feldspar and Its Varieties, Book 6 Identification of Amber, Book 7 Identification of Coral, Book 8 Identification of Pearls and Book 9 Identification of Opals.