Refractometer white For the partially sighted_No To view 'live' on a

To view 'live' on a PC use the USB cable supplied

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

fifteen not five)

1g / 3000g (3000g is about 96oz)

Refractometer white For the partially sighted_No To view 'live' on aSummary 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