impsonite

[ imp-suh-nahyt ]
/ ˈɪmp səˌnaɪt /

noun

a black variety of asphaltite with a jagged fracture.

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Origin of impsonite

1900–05; named after Impson, valley in Oklahoma; see -ite1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020