The Filter Kit contains all the additional Filters including Filter 2, 3 and the LW Filter 4. This is the Add-on to GemPen® Diamond Screener which upgrades it to GemPen® Premium.
These Filters in combination with the Filter 1 (included with GemPen® Diamond Screener) offers the professional gemmological user the means to screen Diamonds, Rubies & Sapphires for synthetics and treatments by searching for discrepancies in the fluorescence and phosphorescence for further analysis. Filters 2, 3 and 4 are used in combination with Filter 1 to screen for synthetics and flame-fusion (Verneuil), as well as heat, beryllium, cobalt, glass fillings and most other treatments of Corundum.
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