English
amphibolite
From amphibole + -ite.
A compound of amphibole + -ite
Proto-Indo-European *gʷelH- ‘to hit by throwing’
…
Ancient Greek βάλλω ‘to throw’
Ancient Greek ἀμφιβάλλω ‘to waver, to hesitate’
Ancient Greek ἀμφίβολος ‘ambiguous’
French amphibole
English amphibole
Today it means
noun Any of a class of metamorphic rocks composed mainly of amphibole with some quartz etc.
Language periods are conventional ranges, not dates for this word.
Etymograph / amphibolite