Specification:

1. Excellent material of iceland spar.
2. With standard rectangle window and square window can be choosed by user.
3. 360°rotatable of stage, gemstone as well as dichroscope for meeting the best focal length.
4. Easy operation.
5. With black appearance for avioding reflected interference.
6. Big eyepiece for easy and clear observation.
7. With own patent.

http://www.szfable.com/Products_show.asp?id=546&p_id=15&p_name=Calcite Dichroscope