Monazite tutorial Optical mineralogy

Описание: Several videos of monazite in thin section, showing typical textures and optical characteristics. Supported by Boise State University and the US National Science Foundation.
Key characteristics: high relief, causes pleochroic haloes in biotite and chlorite, high interference colors, less symmetry than zircons.
00:00 Inside biotite, generating pleochroic halo
00:31 Inside biotite, pleochroic halo, monoclinic form
01:01 Inside kyanite, high relief, slightly tan
01:31 Inside andalusite with reddish "staining" (radiation damage?)
02:02 Inside andalusite with reddish "staining" (radiation damage?)