many diamonds tweezers and diamond testing machine close |
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| navigate by keyword : brilliant carat certification certify check closeup control crystals cutting dealer detail device diamond electronic equipment examining expensive gem gemstones grade hand hold holding indicator jewel jewellery job luxury machine modern octahedron portable precious precise profession professional quality real scale selector stones technology test tester testing tool trade tweezers value work |
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| Selection and sorting of diamonds using special device for quality control. Many diamonds, tweezers and diamond testing machine close up. |
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