Definify.com
Webster 1913 Edition
Marmatite
Mar′ma-tite
,Noun.
[Cf. F.
marmatite
.] (Min.)
A ferruginous variety of shalerite or zinc blende, nearly black in color.
Definition 2024
marmatite
marmatite
English
Noun
marmatite (plural marmatites)
- (mineralogy) A dark form of sphalerite that is rich in iron