Dichroscope, folding Options_USB Hold the light button to

Hold the light button to adjust brightness

and by taking minimum and maximum readings for each

If diamond

and you then have to decide which one it is

Dichroscope, folding Options_USB Hold the light button toSummary Folds into a case (like a loupe), 20mm dia. If a stone is dichroic (transmits two colours at once) you will see the two distinct colours when viewed through a dichroscope. You can often see the two colours by viewing the stone from different directions, but this can be difficult (often impossible with stones is set in jewellery), it's easier to use a dichroscope. Is it easy to use? Yes. Limitations & Disclaimer For coloured stones only. This