The heat treatment of ruby and sapphire

• 作者： Themelis, Ted
• 出版： [Clearwater, Fla.] : Gemlab
• 版本：1st limited ed
• 主題： Rubies--Heat treatment , Sapphires--heat treatment
• ISBN： 0940965100 :: US$94.00
• 資料類型: 圖書
• 內容註: Includes bibliographical references (p. 228-231) and index "An account of the most commonly practiced heat treatment methods and apparatuses, which alter the appearance of the ruby and sapphire; their occurences, descriptions, inculusion characteristics, identification, and other features."
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