Polarisation device PKS16

Polarisation device for the extension of Stereo microscopes

Polariscopes show whether the material exhibits single or double refraction. They also show elongation and twinning, which helps distinguish artificial from real gems. This extension is primarily used for analysis with brightfield or Transmitted light mode is used. Here, the light passing through the stone is analysed using the parallel or crossed polarisers.

The Polarisation device consists of a fixed polarization filter (polariser) under the object to be investigated and an insertable/movable polarization filter (analyser) located above the object.

For practical examples and tips on investigations using the polariscope device and determining gemstone imitations or distinguishing ruby or tourmaline, see the article: Distinguishing gemstones from glass.

You can find background information on investigations with the polariscope in the Polariscope methods article.

Practical examples of microscopy can be found in the articles: Using stereo microscopes to examine inclusions (bright-field microscopy) and Applying bright-field or dark-field microscopy.