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Primary and secondary prisms
Works in Salt Water
* Water Based Cleaners
This unit is unlike anything else sold on eBay
The HI 96811 digital refractometer eliminates the uncertainty associated with mechanical refractometers and is portable for measurements in the field
Gem Refractometer Gemology Gemologist RGM-100 w/ 789nm Flashlight RI 1.800 Misco Primary and secondary prismsItem Description: RGM 100 Portable Gemological Refractometer with a flashlight COMES WITH 10 Gram Vial (1. 8ml) of 1. 800 Index Fluid Comes with instructions! Written by our staff, not converted from another language! Comes with a Gemstone Refractive Index Chart! Comes in a black zipper case! Product Specs: Measuring Range : 1. 30 1. 81 RI Minimum Graduation : (RI) 0. 01 RI Dimension : 125mm x 70mm x 40mmScale Division : 0. 01 nD Weight : 0. 4 kg
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