Multi-color Bricks with Dangles Earrings

So what do you call a rectangular tube shape? The only thing I could think of was "brick". Anyway, these gold foil-lined rectangular tubes have interesting swirls of black and splotches of green/blue and pinky-red. I paired them with Swarovski bicone dangles in peridot, Caribbean blue opal, and padparadscha satin. The earwires and headpins are Argentium silver that I balled in my metalsmithing class. The wire through the "brick" is also Argentium.