Dear Student,
Sulphur is a crystalline, polycrystalline and an amorphous compound because Sulphur has various allotropes. It exists as Rhombic Sulphur, Monoclinic Sulphur, Plastic Sulphur, Amorphous Sulphur and Colloidal Sulphur which has different physical states. Therfeore, ​Sulphur is a crystalline, polycrystalline and an amorphous compound.