We recommend adding the Filter 4 which will help you distinguish between a natural fluorescing diamond and a lab-created diamond.
GemPen® Diamond Screener is used to screen diamonds for naturals, HPHT and CVD grown synthetics and includes Filter 1. It also gives indications on treatments such as HPHT treatment of natural diamond. It is possible to later upgrade your GemPen® Diamond Screener by buying the additional Filter Kit.
Available on backorder