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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Colombian Emeralds ： ウィキペディア英語版 Colombian Emeralds Emeralds are green precious stones that are mined from the ground. They are the premier gems in the Beryl family of stone-rocks. For more than 4,000 years, emeralds have been among the most valuable of all jewels on earth. Colombia, located on the continent of South America, is the country that mines and produces the most emeralds for the global market. It is estimated that Colombia accounts for 70-90% of the world's emerald market.〔(【引用サイトリンク】title=Emerald: The Queen of Gems )〕 While commercial grade emeralds are quite plentiful, fine and extra fine quality emeralds are extremely rare. The Colombian state departments of Boyacá and Cundinamarca, both found on the eastern ridge of the Andes Mountains that runs north-south throughout the entire country, are where most of the emerald mining takes place. Colombian emerald companies believe the rarity of sedimentary rock found in the emerald deposits to be the reason why Colombian emerald deposits are "the purest emerald deposits found on earth."〔 Although the Colombian emerald trade has a rich history that dates as far back as the pre-Spanish period, the increase in worldwide demand for the industry of precious stones in the early 20th century has led prices for emeralds to nearly double on the global market. Today, the Colombian emerald trade is at the center of Colombia's civil conflict which has plagued the country since the 1950s. ==History of Emerald Extraction== 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Colombian Emeralds」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.