GemPen
GemPen® Premium is the most complete kit that we have to offer; it includes all the different filters to screen and analyze Diamonds and to give indications on Corundum (Rubies & Sapphires). The included LW Filter 4 (in combination with Filter 1) helps the user to distinguish between a naturally fluorescing diamond, lab created diamonds or an HPHT treated natural diamond. Filters 2 and 3 are used in combination with Filter 1 and 4 to screen for synthetics and flame-fusion (Verneuil), as well as heat, beryllium, and other treatments.