hornblende
noun
- variety of calcareous aluminous amphibole
Wiktionary
Pronunciation: /ˈhɔːnˌblɛnd/ / /ˈhɔɹnˌblɛnd/
noun
Etymology: From German Hornblende, from Horn (“horn”) + Blende (see blende).
- A green to black amphibole mineral, of complex structure, formed in the late stages of cooling in igneous rock.