PRESIDIUM Synthetic Diamond Screener Manual De Instrucciones página 6

Currently, known synthetic colorless diamonds are generally Type IIa
diamonds i.e. colorless diamonds without any presence of detectable
nitrogen atoms. Type IIa colorless synthetic diamonds can be grown
either using chemical vapor deposition (CVD) synthesis or
High Pressure High Temperature (HPHT) synthesis, or can be HPHT-
treated CVD diamond.
This device helps to identify the Type IIa colorless diamond, which
thus may be a synthetic diamond, but does not distinguish between
the various processes through which the synthetic diamond may be
grown.
When subjected to deep UV irradiation, Type Ia and Type IIa
diamonds each absorb different amount of UV light and this difference
in the light absorption is significant enough to aid in differentiating
between colorless Type Ia and Type IIa diamonds.
The SDS is developed and designed based on this principle. Type IIa
diamonds allow more deep UV light to pass through and thus its UV
light absorption ability is low.
This device, meant only for use on colorless diamonds (Color D to
J), features a safe, user-activated, deep-wave UV light source that
passes through the tested stone towards the photo-detector on
the base platform inside the product. Bars of colored light on the
front of the lid will provide an easy reading to indicate if the UV light
absorption ability of the tested stone is low (i.e. indicative of a Type IIa
diamond) or high (indicative of a natural diamond).
If the UV light absorption measurement is low, a single red light
bar will light up alerting the tested stone is a Type IIa diamond,
which could be synthetic and therefore should be subjected to other
supporting tests.
If the UV light absorption measurement is high, a single blue light bar
will light up, indicating that the UV light absorption of the tested stone
corresponds to the usual absorption range characteristic of a Type I
colorless natural diamond.
Created with the user in mind, the Synthetic Diamond Screener is
designed to be a lightweight, portable, sturdy and non-slip unit that
can be powered by 4 AAA batteries or through its USB port that
connects to either an external power source or to the Presidium
Universal Power Adaptor.
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