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This digital instrument will read both the refractive and reflective indices of well-polished and faceted gemstones without the use of RI Liquid
Set of 2 diamond coated burrs
Solder copper brass pewter bronze zinc lead
Intelligent pump control to avoid idle phases due to refilling
Precise finish and alignment
Optima Portable Color Grader Gemstone Light Diamond Grading Case This digital instrument will readThis light source simulates daylight for diamond grading and has longwave UV light for fluorescence. The grooved, built in grading tray is made of near perfect white hard plastic that can be easily cleaned and will not change colour. Powered by batteries, the unit is small enough to fit in your bag or briefcase.