1. Behr diamonds report II
HRD Research investigated all diamonds of the parcel provided by behr’s company.
Different techniques were used to define the origin of the diamonds:
- Fourier Transform Infrared (FTIR) absorption spectroscopy
- UV-VIS absorption spectroscopy
- DiamondViewTM
- Photoluminescence spectroscopy
FTIR absorption spectra show most diamonds are type IaAB type diamonds. Six diamonds
where of type IIa or border type Ia-IIa, as shown in fig.1. Further investigation was performed on these
stones. DiamondViewTM
images (fig.2) show blue and green fluorescense in an irregular
pattern. UVVIS spectra(Fig.3) and PL spectra are in accordance with natural type IIa type
diamonds.
Fig.1: FTIR spectra taken of type IIa and border type Ia-IIa diamonds.

2. TypeIIa Type IIa Type IIa Type IIa
Type IIa Type Ia-IIa
Fig.2: Diamondview images of the selected diamonds. (Type is mentioned below)
Fig.3: UVVIS spectra of the selected diamonds.
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Nanometers
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3. All these spectroscopic observations support the conclusion that the parcel contains natural
type Ia and type IIa diamonds. Features that are known to be present in colourless labgrown
diamonds are not observed.
Manager Research
Ellen Biermans