Diorite wani nau'in dutse ne mai ban tsoro wanda ya ƙunshi farko na plagioclase feldspar, biotite, hornblende, da/ko pyroxene. Yawanci yana da nau'in nau'in hatsi kuma yana iya zama launin toka, baƙar fata, ko kore a launi. Kalmar diorite ta fito ne daga kalmar Helenanci "diorizein," ma'ana don rarrabewa ko rarrabewa, domin dutsen ya ƙunshi ma'adanai daban-daban waɗanda za a iya bambanta su cikin sauƙi da juna.