German glass artist Heike Brachlow finds inspiration in architecture and geometry, creating cast glass sculptures that rely heavily on their shape, which is often that of a cylinder or cube. Works in her Theme and Variation series seem to impossibly balance as they subtly curve upwards, individual cubes colored with the same mixture of oxides at increasing amounts. Her pink work, seen below, contains neodymium oxide which causes it to change color in different lights, shifting from a pink to green hue depending on which light the glass sculpture is displayed under. More