The ornamental design of a geometricalcolumnunit, as shown and described.
FIG. 1 is a top perspective of a geometrical column unit, showing my new design;
FIG. 2 is a front side elevational view thereof, the back side elevational view being a mirror image thereof;
FIG. 3 is a right side elevational view thereof, the left side elevational view being a mirror image thereof; and,
FIG. 4 is a top plan view thereof, the bottom plan view being a mirror image thereof.
The new, original, and ornamental design of 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/broken surface pattern of the right, left, front and back sides.