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Sunstone
Sunstone is a plagioclase feldspar, which when viewed from certain directions exhibits a brilliant spangled appearance; this led to its use by the Vikings to locate the Sun for navigational purposes . It has been found in Southern Norway, Sweden and in various United States localities. I ==Properties==
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「Sunstone」の詳細全文を読む
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