$99.99 Gemstone GEM Refractometer - Gemology Gemologist GIA

RGM-700 Portable Gemological Refractometer w/ a 3.6ml Vial of 1.800RI Fluid Comes with EASY TO FOLLOW instructions!  Written by our staff, not converted from another language! Comes with a Gemstone Refractive Index Chart! Comes in a black zipper case! Comes with 3.6ml of 1.800 Refractive Index Fluid - MORE THAN ANY OTHER SELLER! Product Specs: Range: 1.30-1.81 Refractive Index (RI)Resolution: +/- 0.01 RIAccuracy: +/- 0.01 RIDimension: 4.5" x 1.5" x 2.5"Weight: 400 GramsSturdy, Portable Design made of die cast aluminum, not plastic like the GIA ones Perfect for the GIAStudent, Hobbyist AND Professional! This item is an exceptional Value!  Quality Unit, Right RI Fluid!   The RGM-700 Portable Gemological Refractometer in a Black Vinyl Zipper Case in a sturdy hard case. This handy little piece of equipment tests a gemstone's ability to slow down or bend light. The amount of slowing down it does to a beam of light is called the refractive index. THIS UNIT WILL HELP YOU DETERMINE WHICH