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Cardinal gems are gems which have traditionally been considered precious above all others. The classification of the cardinal gems dates back to antiquity, and was largely determined by ceremonial or religious use and rarity. The term has largely fallen out of use. The five traditional cardinal gems are: *amethyst (purple) - Considered rare and precious in the Old World, until large deposits were found in Brazil. *diamond (white) *emerald (green) *ruby (red) *sapphire (blue) ==References== 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「cardinal gem」の詳細全文を読む スポンサード リンク
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