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GEM中文 (简体)翻译:剑桥词典 - Cambridge Dictionary gem noun [C] (JEWEL) Add to word list (also gemstone) a jewel (= precious stone), especially when cut into a particular regular shape
GIA Gem Encyclopedia | Complete List Of Gemstones GIA’s Gem Encyclopedia is a virtual journey through the science and lore of gemstones from across the globe Each precious stone page features additional detailed gemological information, a buyer’s guide, photos, videos research
Gemstone | Definition, History, Types, Facts | Britannica Gemstones have attracted humankind since ancient times, and have long been used for jewelry The prime requisite for a gem is that it must be beautiful The beauty may lie in colour or lack of colour; in the latter case, extreme limpidity and “fire” may provide the attraction
An Introduction to Gemology - International Gem Society Gem Formation: How are Gemstones Created? Gem formation usually involves mineral crystallization and other geological processes Learn how these affect the gemstone properties gemologists study
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