Dichroscope, folding Options_USB They also say it should

They also say it should be replaced after a year (a year from the date on our sticker)

See the tbal-10Kg

non-diamond

and by taking minimum and maximum readings for each

Dichroscope, folding Options_USB They also say it shouldSummary 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