Chelsea Filter CF100
40,00 €
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Available from stock
Dichromatic filter for distinguishing between different gemstones viewed together, makes color changes visible
Availability: In stock
Description
Chelsea filter
Colour filters allow observations in the range of special wavelengths, e.g. in the red range at 690 nm and in the yellow range at 570 nm. The view through the filters lets some stones appear in different colours and helps to distinguish between gemstones. These filters are also a valuable tool in the assessment of gemstone lots.
Technical details:
■ Filter glass: Ø 19 mm
■ Dimensions (W×W): 45 mm x 55 mm
■ Weight: approx. 16 g
Practical examples of the application of color filters can be found, for example, in the article: Detecting counterfeits with color filters.
More information on the examination method with the Chelsea filter or with the Rubin filter can be found in the color filter method article.
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