PRESIDIUM Synthetic Diamond Screener Manual De Instrucciones página 23

Blue Bar of light/Natural
The first bar on the left will indicate the 'Natural' reading and will be lit
in blue (Fig 3.2).
Fig.3.2 'Natural' Reading
The blue light labelled 'Natural' indicates the UV light absorption ability
of the tested diamond stone is high as there are trace elements within
the stone that has absorbed the UV light, thus allowing very little UV
light through to the photo-detector. This is characteristic of a natural
Type I colorless diamond.
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