Joined: Sun Oct 16, 2005 12:22 pm Posts: 21602 Location: San Francisco
Hi and welcome. You might want to check our page on the dicroscope in the Gemology Project: http://www.gemologyproject.com/wiki/ind ... ichroscope A dichroscope is predominately used to check for pleochroism. Pleochroism is a characteristic observed in colored anistropic (double refractive) gemstones.
Here is a tutorial by Starla Turner, GG, FGA on the use of a dicroscope.
Joined: Sat May 21, 2011 7:09 am Posts: 77 Location: Italy
Hi Irfan,
I like London dichroscope, it is easy to use: I made some for my friends, using polarized film removed from broken LCD screen.
As described in previous post, it is used to detect pleochroism of gems/minerals. Spot the gem (under sun or artificial light) and observe with the dichroscope near the gem. Rotate the gem for better color difference. Alexandrite, Andalusite, Tourmaline, Tanzanite, Iolite, and more are amazing.
In the same way, with the dichroscope, you will be able to detect the optical axis.
Hi and welcome. You might want to check our page on the dicroscope in the Gemology Project: http://www.gemologyproject.com/wiki/ind ... ichroscope A dichroscope is predominately used to check for pleochroism. Pleochroism is a characteristic observed in colored anistropic (double refractive) gemstones.
Here is a tutorial by Starla Turner, GG, FGA on the use of a dicroscope.
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