gneissoid
/ˈnaɪsɔɪd/
adjective
- Resembling gneiss in appearance or structure, but not actually gneiss.
- Under the microscope, the sample appeared gneissoid but lacked the mineral composition of real gneiss.
- The quarry produced a gneissoid stone that was popular for decorative walls.
- The rock had a gneissoid look, with wavy bands that mimicked true gneiss.