diabantite
noun
di·a·ban·tite
ˌdīəˈbanˌtīt
plural -s
: a mineral approximately (Mg,Fe,Al)3(SiAl)2O5(OH)4 consisting of a basic silicate of magnesium, iron, and aluminum
Word History
Etymology
modification (influenced by -ite) of German diabantachronnyn, irregular from German diabase + Greek chrōnnyein to stain