Consider that a brick is a bunch of tiny little rocks held together with mortar (like a hard dried mud). You can break away the mortor with reletively little force, making the concentrated force of the individual rocks less. Chop one solid rock, and you get a different experience.
That glass is one chunk of glass structure, more likely to shatter from the force then it is to actually take surface damage. The force it takes to shatter the glass is likely to be more then the force needed to chip away peices of a brick.
Glass will most certainly roll, mash, and dent busse's edge. Though INFI is 60rc, its a meleable 60rc, wich is what makes it so wonderful for heavy abuse - the fact that it will dent and roll instead of chip.
INFI blades are not invincible, and will actually roll and dent fairly easily on hard targets like staples and rocks and glass. It shouldnt roll or dent excessively, but likewise it's not an immovable adamantium metal.
Heck, I rolled the edge of my HOGFBMLE on alluminum cans. If you concentrate enough force on a small enough area of the edge, you'll move metal even if the target is a lower rc then the blade.
If your blade actually chipped - there's something wrong with it. The metal should have mushroomed out around the dented areas, or rolled to the side, or been pushed to the side. there shouldnt be missing metal unless it was literally torn off the blade, wich I don't think would have happened from what you described.
