diorite
noun
di·o·rite ˈdī-ə-ˌrīt 
: a granular crystalline igneous rock commonly of acid plagioclase and hornblende, pyroxene, or biotite
dioritic
ˌdī-ə-ˈri-tik
adjective 
Example Sentences
Recent Examples on the Web Made of blocks of red quartzite and gray diorite, the chapel housed the sacred bark of Amun when not in use for Opet or other festivals. 
National Geographic, 25 June 2019
National Geographic, 25 June 2019 Word History
Etymology
French, irregular from Greek diorizein to distinguish, from dia- + horizein to define — more at horizon
First Known Use
1826, in the meaning defined above