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希少なルビーを発見！価格は適正か？
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The world's most expensive Ruby sold for $34.8 million dollars #shorts
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ルビーの見分け方 | ルビーは紫外線ランプや蛍光灯の下で光ります | 天然ルビーと偽物ルビー
Ruby gemstone sells for record $34.8 million | AFP
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Mozambique ruby sells for record $34.8 million • FRANCE 24 English
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