The ornamental design of a geometricalcolumnunit, as shown and described.
FIG. 1 is a front perspective view of a geometrical column, showing my new design;
FIG. 2 is a top side perspective view thereof;
FIG. 3 is a side elevational view thereof;
FIG. 4 is a top view thereof; and,
FIG. 5 is a bottom view thereof.
The new, original, and ornamental design of the geometrical column unit is contemplated to be a repeatable single segment capable of being stacked at the top and/or bottom surfaces to continue an unbroken/or broken surface pattern of the right, left, front and back sides.