This book examines the history of opals dating back to ancient times. It describes where opals are located throughout the world and how they are mined and details the techniques for cutting, polishing, and working with this difficult gemstone.
發表於2025-01-15
The World of Opals 2025 pdf epub mobi 電子書 下載
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The World of Opals 2025 pdf epub mobi 電子書 下載