H Refractive index of a solid is observed to have the same value along all directions

H Refractive index of a solid is observed to have the same value along all directions. Comment on the nature of this solid. Would it show cleavage property?

As solid has the same value of refractive index, along all directions, this suggests that it is isotropic and thus amorphous. Therefore, it would not show a clean cleavage when cut with a knife, it would break into pieces with irregular surfaces.