Plessite

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Plessite is a fine-grained mixture of the minerals kamacite and taenite found in the octahedrite iron meteorites. It occurs in gaps between the larger bands of kamacite and taenite which form Widmanstätten patterns.

Many types of plessite exist and vary in formation mechanism and morphology. Some types of plessite as named by Buchwald's "Iron Meteorites" and Massalski's "Speculations about Plessite" are
acicular plessite/Type I plessite
black plessite/Type II plessite
cellular plessite/Type III plessite
comb plessite
net plessite
pearlitic plessite
spheroidized plessite

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