large gemstone and loupe jeweler hands close gem identifying evaluating process |
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| navigate by keyword : artificial carat checking close colorless crystal diamond evaluating expert gem gemmology gemology gemstone hand hands identifying investment jeweler large loupe man natural process professional quartz sapphire sience stone trade tweezers zircon |
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| Large gemstone and loupe in jeweler's hands close up. Gem identifying and evaluating process. |
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