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Gem Instruments "Gem Diamond Lite"
GIA "Gem Diamond Light" for color grading and detecting fluorescence. Not a requirement for newcomers but a nice addition for serious dealers.
GIA's Gem Instruments sells the "Gem Diamond Lite", which -- along with color grading lighting -- produces the long-wave ultraviolet lighting needed to check for the presence of fluorescence. This is especially handy when doing a lot of grading for buying purposes, or for demonstrating the presence of fluorescence to customers.
