DEWEYLITE

-ˌlīt noun

( -s )

Etymology: Chester Dewey died 1867 American clergyman and scientist + English -lite

: a mineral Mg 3 Si 2 O 5 (OH) 4 occurring as a hydrous amorphous resinous magnesium silicate (hardness 2-3.5, specific gravity 2.0-2.2)