Mixing brick collections
The individual flecks of dark brick draw attention. There are a lot of ready-made collections, and there are a bunch of contrasting ones (Bavarian masonry). But in ready-made collections mottled bricks or clinker tiles are mixed in roughly equal proportions. And to get the effect as pictured, you need to take one basic collection and mix in a small amount of contrasting bricks from another collection. And you get a unique beauty that no one else has.
It's even possible to make individual figures out of bricks, I once wrote about historical ornamental masonry, but there's a place for that in modern architecture too!"