Picture of various types of organic gemstones - gemmology course cover image
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Content Duration: 3 hours

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Pearls 1 Topic
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Amber 1 Topic
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Coral 1 Topic
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Shell 1 Topic
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Ivory and Bone 1 Topic
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Seeds & Nuts 1 Topic
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Wood & Jet 1 Topic
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Skins 1 Topic
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