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Jewelers of America
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Trade organization for retail jewelers. Consumer information, membership, and affiliates.
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Federation for European Education in Gemmology
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A consortium of gemmological institutes formed to establish a standard of European certification, which members must adhere to. List of the member institutes and their offered courses.
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German Gemmological Association
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Training and research in modern gemmology. Programs and fees, diamond grading, and enrollment. Site in English and German.
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