14K Gold Calibration Disc for Gemoro Auracle Tester HAD Diamond Brilliance Viewer It can be used for

It can be used for accurate measurement of Ring Sizes and circumferences for the purpose of determining the amount of material required for manufacturing

Female-Female standoffs and Male-Female standoffs are both included in this set of different sizes

Magnification: 40x 100x 400x (WF10X)

Durston 1181

14K Gold Calibration Disc for Gemoro Auracle Tester HAD Diamond Brilliance Viewer It can be used forGemOro 14K Gold Calibration Disc for Gemoro Auracle AGT1 Tester. 14K Yellow Gold Use for Gemoro Auracle, AGT1 Gold Tester 6. 4mm (1 4") wide For Calibration of Gemoro Auracle Analyzer and Auracle Pro, you will require the 18k gold Calibration Disc