Refractometer white For the partially sighted_No adjustable in two directions

adjustable in two directions

you won't be able to read anything at all at hight magnification

Gives correct results about 95% of the time (6% false positive rate

Now look at the finest detail

Refractometer white For the partially sighted_No adjustable in two directionsSummary For the gemmologist the refractometer is the most important gem tester after a loupe. It measures refractive index (to what extent light is bent as it passes through the gemstone). This product is intended for gemmologists (or those about to study gemmology) instructions are not included. Advanced model, has the advantages (over the standard model): large eyepiece enables easy viewing of the measuring scale (much easier than on a standard