RUBY FILTER

Ruby 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:

• Gray painted metal housing with optical glass
• Filter glass: Ø 18 mm
• Dimensions (W × W): 45 mm x 50 mm
• Weight: approx. 21 g