Results forgemological labs mohs hardness testerfrom 2 Products.
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Hardness Pencil Set Gem Testing Instruments With 6 Pieces Standard Hardness Testing Pencils Model Number: FMH-6 Hardness Pencil is used for scratching the rough gemstones. If there ...
china
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Portable quick Hardness Level Tester Genuine tools Gemstone Mohs hardness pencil Model Number: FMH-8 Hardness Pencil is used for scratching the rough gemstones. If there are ...
china
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