Jewelry and Refractive Index Testing tool 1.35 - 1.85 Range Refractometer refractometer is the most important professional tool for identi...
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Optical equipments for built-in Led jewelry Hand-Held Product description The Refractometer is an important instrument which mea...
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Jewelry Microscope High Hardness CZ Test Prism A24.6321 Professional Optical Design, High Hardness CZ Test Prism, Clear Shadow Bound...
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... of a gemstone, which often gives vital clues to the identity of a gemstone. Fable brand provides a numerical reading from a scale yo...
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Aluminum Alloy Casing 3 Light Sources Expert Gem Torch Highlight Features of Dedicated Jade Flashlight: THREE LIGHT SOURCES. You buy one flashlight, g...
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