It can be identified in metamorphic rocks by its swiss cheese appearance ( with poikilitic quartz ) and often mantled porphyroblastic character.
2.
Typical examples of metamorphic rocks include porphyroblastic schists where large, oblate minerals form an alignment either due to growth or rotation in the groundmass.
3.
Upon cessation of metamorphism, the sulfides may inherit a sheared texture, and typically develop bright, equigranular to globular aggregates of porphyroblastic pentlandite crystals known colloquially as " fish scales ".
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