Kyanite 
Note the first-order interference colors and prismatic habit of kyanite.
UNC sample
NC-349
Rock type
kyanite-garnet-
mica schist
Locality
near Durham, NC
Kyanite Note the first-order interference colors and prismatic habit of kyanite. |
UNC sample NC-349 | |
Rock type kyanite-garnet- mica schist | ||
Locality near Durham, NC | ||
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