diorite
Noun
Meaning
An igneous, crystalline in structure, consisting essentially of a triclinic feldspar and hornblende. It includes part of what was called greenstone.
Source: Webster's dictionarySynonyms
granite
marble
limestone
slate
sandstone
shale
basalt
conglomerate
breccia
gneiss
gabbro
quartzite
andesite
schist
albite
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Examples
At the end of one of his shafts, Dixon discovered a ball of black diorite (a type of rock) and a bronze implement of unknown purpose.
The quartz-syenites and nordmarkites may be interposed between granite and syenite, the tonalites and adamellites between granite and diorite, the monzoaites between syenite and diorite, norites and hyperites between diorite and gabbro, and so on.