M31
Frame ID: M31
Sample ID: Metallurgical Coke
Magnification: As given
Illuminator: Vertical
Objective: 50x oil
Polarizer: In
Analyzer: In
Retarder Plate: In
Filter: None
Important Features: Pyrite inclusion
Description: The bright area in the upper left part of the frame is pyrite. Note the reaction zone and reduced mosaic size around it.