cossyrite

\\ˈkäsəˌrīt\ noun (-s)

Etymology: German cossyrit, from Cossyra, island near Sicily (now Pantelleria) + German -it -ite

: a variety of aenigmatite occurring in minute crystals in lava

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cossyrite Min.

(ˈkɒsɪraɪt)

[Named 1881 from Cossyra, ancient name of the island Pantellaria, between Sicily and Africa: see -ite.]

A silicate of iron found in lava.

Dana Min. App. iii. 31.