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Colored Gemstone identification course Total Seats: 30
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Diamonds grading course Total Seats: 45
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Advanced gemstone identification course Total Seats: 20
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Gemstone testing and grading certifying Total Seats: 15
Colored Gemstone identification course Total Seats: 30
Diamonds grading course Total Seats: 45
Advanced gemstone identification course Total Seats: 20
Gemstone testing and grading certifying Total Seats: 15
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