File:UV-ViS-NIR.JPG
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UV-ViS-NIR spectrometer
Photo courtesy: Gübelin Gemmological Laboratory, Ltd.
This instrument analyzes a full range of spectrum, from the ultra-violet to near infrared. A gemstone absorbs light at a different range depending on its natural or treated trace elements or color centers. The UV-Vis-NIR technique is used to:
- Provide the geological environment and origin of gemstone
- Determine the origin of color of a gemstone
- Determine the source of corundum from different localities
- Identify unknown gem materials
- Type classification of diamonds
- Differentiate natural from synthetic materials
- Detect irradiation or heat treatment of gemstones
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| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 09:58, 1 November 2009 | | 448 × 336 (22 KB) | Tim (talk | contribs) | UV-ViS-NIR spectrometer Photo courtesy: Gübelin Gemmological Laboratory, Ltd. <br /> This instrument analyzes a full range of spectrum, from the ultra-violet to near infrared. A gemstone absorbs light at a different range depending on its natural or tr |
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