The ornamental design for a rough stonelookingstep, as shown and described.
FIG. 1 is a front isometric view of a rough stone looking step;
FIG. 2 is a rear isometric view of the rough stone looking step of FIG. 1;
FIG. 3 is a front elevation view of the rough stone looking step of FIG. 1;
FIG. 4 is a rear elevation view of the rough stone looking step of FIG. 1;
FIG. 5 is a right side elevation view of the rough stone looking step of FIG. 1;
FIG. 6 is a left side elevation view of the rough stone looking step of FIG. 1;
FIG. 7 is a top plan view of the rough stone looking step of FIG. 1; and,
FIG. 8 is a bottom plan view of the rough stone looking step of FIG. 1.
The broken lines represent structure or features that form no part of the claimed design. The appearance of any portion of the rough stone looking step between the break lines shown in FIGS. 1-8 forms no part of the claimed design.