FA89

Frame ID: FA89
Sample ID: 91950 (slide 388-25)
Magnification: 270 microns on long side
Illuminator: Vertical
Objective: 50x oil
Polarizer: Out
Analyzer: Out
Retarder Plate: Out
Filter:
Important Features: Spinel

Description: Spinel sphere with contrasting textures. Fly ash from power plant burning high-sulfur, high volatile C Western Kentucky coal.