宝石大学#40「オパール最大の魅力とは？」
＃宝石 ＃ジュエリー ＃オパール 宝石大学もついに40回！！ 今回の講義は虹色の輝きを放つ人気宝石オパール！ 不思議な輝きの秘密と、最大の魅力に迫ります！ 00:00 オープニング 01:00 名前の由来 01:45 虹色に輝くメカニズム 03:20 エンディング
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宝石大学＃41「オパールの種類」
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[GSTV] Gem University #39 "Turquoise Sources and Characteristics"
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[Miracle of Nature] Beautiful play-of-color! Introducing the charm of opal, the October birthston...
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執念で見つけた！？トルマリンの最高峰！？パライバトルマリン
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オーストラリア産ブラックオパールとボルダーオパールの違いと見分け方 Part 2
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[Traditional Techniques] A Master of the Rare “Kakkomi” Technique [First-Class Gemstone Polisher ]
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Kashmir Sapphire Documentary Patrick Voillot
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宝石大学#20 「エメラルドの産出地 2」どっちが好み？ ザンビア or ブラジル
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[Manga] 7 Hidden Rules Only the Wealthy Know...
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ボルネオ島のカラーダイヤモンドのドキュメンタリーPatrick Voillot
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[Gemstone Introduction] Gemstone Encyclopedia Selected by Color
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幸せを呼び込むパワーストーン！？オパールの真実とは！？
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Top 10 | Most Beautiful and Fascinating Opals Around the World
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[You may not know this!] We will introduce the Japanese names of gemstones, birthstones, and rare...
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[October Birthstone] A relaxed discussion of opal 💎✨
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ダイヤモンドより高価な10個の石！
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Natural, Synthetic, or Glass? Pro Crystal Identification by Japan Gem & Precious Metals Association
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