S₁C₃H₄I₁S₁T₁

11 points

SCHIST is validvalid

a rock that readily splits into parallel layers [n SCHISTS]

27,521 of 196,601 in NWL2023·also valid in CSW24

a type of metamorphic rock, also SHIST [n -S]

214,969 of 280,887 in CSW24·also valid in NWL2023