Natural Mineral, Quartz
This large quartz grain is from an oil sample collected from a 8400kVA transformer. This
transformer was reportedly gas blanketed and sealed. The presence of this quartz particle
with clay deposits along the left edge of the particle clearly indicates that this particle
is from the exterior environment and not from a construction material used in the transformer. The small white particle near the bottom
right is a corn starch grain.
Transmitted Oblique Off Crossed Circular Polarized Light
Significance in the Environment: