deweylite
noun
dew·ey·lite
-ˌlīt
plural -s
: a mineral Mg3Si2O5(OH)4 occurring as a hydrous amorphous resinous magnesium silicate (hardness 2–3.5, specific gravity 2.0–2.2)
Word History
Etymology
Chester Dewey †1867 American clergyman and scientist + English -lite