Platinum Brick

The brick keeps the sparkle the raw ore has, so a wall of it glints as you walk past instead of sitting flat. That effect is the entire argument for using it over any other pale brick. It gives off no light of its own, so a dark room full of it just looks dark.

The ore stretches a long way once you convert it, so facing a whole build in this costs less platinum than it looks like it should. The brick is worthless to sell, which means anything you make you may as well place.