{"product_id":"gemometrics-gempen-lens-filter-kit-for-diamond-screener","title":"GemPen Lens Filter Kit for Diamond Screener","description":"\u003cp\u003e\u003cstrong\u003eGemPen Lens Filter Kit for Diamond Screener\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe 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.\u003c\/p\u003e\n\u003cp\u003eThese Filters in combination with the Filter 1 (included with GemPen® Diamond Screener) offers the professional gemmological user the means to screen Diamonds, Rubies \u0026amp; 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.\u003c\/p\u003e\n\u003cp\u003eThe User Guide can be downloaded \u003ca href=\"\/wp-content\/uploads\/GemPen%C2%AE-Fluorescence-Colour-Map-User-Guide-Updated-2018-12-12.pdf\"\u003ehere\u003c\/a\u003e\u003c\/p\u003e","brand":"Gemometrics","offers":[{"title":"Default Title","offer_id":59398086558030,"sku":"GemPen FK50","price":810.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1025\/2940\/1166\/files\/1719015083-91654200.png?v=1775927231","url":"https:\/\/maddisonsofdurham.co.uk\/products\/gemometrics-gempen-lens-filter-kit-for-diamond-screener","provider":"Maddisons of Durham","version":"1.0","type":"link"}