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Director of Research
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Gem Instruments: Digital Refractometer Camera Director of ResearchGem Instruments: Digital Refractometer. RI Test Range: 1. 30 to 2. 99RI Work Tempreature: 25 28C Quartz: 1. 544 1. 558RI Topaz: 1. 63 1. 64RI Ruby: 1. 74 1. 78RI The Digital Gem Refractometer GDR800 is a nice optical instrument which will give a reading of the Refractive Index of a clean, flat, well polished facet to reproducibility of 0. 007RI Index Units. With covering the full Range from 1. 30 to 2. 99RI, It is an ideal instrument to identify the