Plessite is a meteorite texture consisting of a fine-grained mixture of the minerals kamacite and taenite found in the octahedrite iron meteorites. It occurs in gaps (its name is derived from the Greek 'plythos' meaning 'filling') between the larger bands of kamacite and taenite which form Widmanstätten patterns. Plessite is a meteorite texture consisting of a fine-grained mixture of the minerals kamacite and taenite found in the octahedrite iron meteorites. It occurs in gaps (its name is derived from the Greek 'plythos' meaning 'filling') between the larger bands of kamacite and taenite which form Widmanstätten patterns.