M34

Frame ID: M34
Sample ID: Metallurgical Coke
Magnification: As given
Illuminator: Vertical
Objective: 50x oil
Polarizer: In
Analyzer: In
Retarder Plate: In
Filter: None
Important Features: Inclusion of anthracite
High Resolution Image (300 dpi)

Description: The brownish particle in the upper center part of the frame is an anthracite inclusion. Notice how the large crack in the coke is stopped at the anthracite boundary.