Glassblock
FIG. 1 is a top, front, left-side perspective view of a glassblock showing my new design; 
     FIG. 2 is a front elevational view thereof; 
     FIG. 3 is a left side elevational view thereof, the right side being a mirror image; 
     FIG. 4 is a rear elevational view thereof; and, 
     FIG. 5 is a top plan view thereof, the opposite side being substantially a mirror image thereof.