The Synthetic Diamond Screener is developed by Presidium® to help screen out Type IIa colorless diamond, which is likely to be synthetic and created through chemical vapor deposition (CVD) or high pressure high temperature (HPHT) syntheses, from the natural Type Ia colorless diamond. When subjected to this deep UV irradiation, Type Ia and Type IIa diamonds each absorb different amount of UV light. Type IIa diamonds allow deeper UV light to pass through and thus its UV light absorption ability is low. This difference in the light absorption is significant enough to aid in differentiating between colorless Type Ia and Type IIa diamonds. Recommended operating conditions: Only for Colorless Diamonds of: Color Grade: D Color to J Color, Carat Size: 0.1 carat to > 10 carats, Cut: For all cuts as long as gemstone has a flat surface, Mounted Jewelry: For jewelry with “open-back” setting.
4 x AAA alkaline batteries.