20X Jewelers Loupes Magnifier Pocket Jewelry Loupe Glass Folding Magnifying Illuminated Magnifying Tool with 21mm UV and LED Light for Eye Rocks

Wholesale Foldable Metal Moonstone Jewelry Magnifier Microscope

20X Pocket Magnifier Mini Portable Magnifying Glass with 6 LED UV Lights Illuminated Loupe for Jewelry Diamonds Gems Coin Stamps Watch Repair Reading Crafts Models Photos (20X-21mm) : Arts, Crafts

20X Jewelers Loupes Magnifier Pocket Jewelry Loupe

10x Magnifier Loupe Jewelry Jewelers Foldable Pocket Illuminated

20x Magnifier LED Dual Magnifying Glasses 4 in 1 Coin Stamp

KINGMAS 40x Jeweller Loupe Folding Magnifying Jewelry Eye Magnifier With LED Light Illuminated (LED Currency Detecting/Jewlers Identifying Type Lupe) : Arts, Crafts & Sewing

The light is used for checking fluorescence in diamonds. Diamonds with fluorescence will appear cloudy when viewed with the light on. Fluorescence is not 'diagnostic' but, as with most tests, it eliminates some possibilities, opens other possibilities, suggests which other tests to carry out, and that's how gemologists identify stones.

21mm Jeweler Loupe 10x Magnifier with LED and UV Light

Pocket Size Illuminated Magnifier Jewel Loupe with 20x

Lighted LED Illuminated Jewelers Jewelry Loupe Magnifying Glass

MAGNIFICATION: 20x Power magnification, LED and UV Lights, 21mm lens diameter The body is made of metal aluminum and a black frame. BLACK in color

20x 21mm Loupe Jeweler Magnifier LED UV Triplet Lens Magnifying Gem Optical Tool Foldaway Pocket Black Frame for Inspecting Diamonds Gemstones