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【楽天市場】【エメラルド（翠玉）】ソ連産 天然石 原石 希少価値アリ：鉱物・鉱石の桐生 from item.rakuten.co.jp What is Emerald Mineral? Emerald mineral is a precious gemstone that is highly valued for its beautiful green color. It is a type of beryl, which is a mineral composed of beryllium aluminum silicate. Emerald is very strong and durable and is used in jewelry and other decorative pieces. It is also one of the most expensive gemstones on the market. Emeralds are found in many countries around the world, including Brazil, Colombia, and India. Where Does Emerald Mineral Come From? Emeralds can be found in a variety of locations around the world. The most common sources of emeralds are Brazil, Colombia, India, and Zimbabwe. Emeralds are found in the earth’s crust and can be mined in open pit mines or in underground shafts. Emeralds are also found in a variety of sedimentary rocks, such as limestone, shale, and sandstone. How Are Emeralds Cut and Polished? Emeralds are cut and polished to enhance their beauty and clarity.