Synthetic Diamond Tester Presidium

Identifies synthetic loose and mounted diamonds through
its low UV absorption

The Synthetic Diamond Screener is developed to help screen
out synthetic Type lla colorless diamonds, which are likely to
be synthetic and created through chemical vapor deposition
(CVD) or high pressure high temperature (HPHT) syntheses,
from natural type Ia colorless diamonds.

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 different
in the light absorption is significant enough to aid in
differentiating between colorless Type Ia and Type IIa diamonds.