Accurate gemstone analysis by means of light spectrum analysis
Krüss offers two series of gem spectroscopes, the KL14-1504 and KL12-1504, for analysing light passing through a gemstone, to confirm identification.
The KL14-1504 gem spectroscope has a wavelength scale, fibre optic light source and intensity control (with no colour change). The Amici prism (5 prism) delivers a sharp spectrum, so that faint lines are easy to view. It has a built-in adapter for scale illumination, and an adapter plate for light source and an integral polariser.
Technical specifications include:
• C-F = 7° angle dispersion
• cold light source illumination (8v, 20w)
• linear dispersion of 60mm
• automatic power switch (110-240V).
• scale range of 400-750 nm
• variable slit
Delivered, the KL14-1504 comprises Handspectroscope series1504, light guide, cold light source, scale illumination, spectroscope holder, polariser, analyser and conoscope.
The KL12-1504 (standard) spectroscope package has exactly the same technical specification as the KL14-1504, and comprises Handspectroscope series 1504, spectroscope holder, polariser, analyser, and conoscope.
For prices and availability information on Gem Spectroscopes, please contact your nearest Krüss distributor, who will be delighted to help. For full technical specifications, please download the relevant datasheet here.
You can find our Gem Spectroscopes in the Gemmo-Shop.
Why Prism spectroscopes?
A gemstone spectroscope breaks up the light being transmitted from a gemstone into its spectral colours. This allows the various wavelengths being absorbed by the gemstone to be viewed. This, in turn, translates into the elements which are contained in the gemstone that are creating the absorption, thereby determining the quality and type of stone.
Therefore, the spectroscope is an important tool in gemmology examinations, assessments and appraisals. There are two types of spectroscopes, prism and diffraction grating – for ease of use, and clarity, the prism spectroscope is mostly recommended.
The prism spectroscope gives a far brighter spectrum, which makes faint lines easier to see. These instruments will usually have a focus slide control as well as a light slit control, allowing for adjustments in the amount of light entering the unit.
For additional ease of use, a built-in light and stand need to be considered, both should be stable whilst the gem is being examined, alongside this consideration a calibrated scale is recommended.
The Amici Prism has been the best choice for producing correctly oriented images in these instruments. The production of an Amici prism is complex, and requires a much higher level of quality than a standard mirror or right angle prism diagonal.