Hand Blown, Cut and Polished Dichroic, Silvered and Mirrored Glass.
All components change colour depending on the position of the viewer in relation to the object. For example, in the image below, the Gold/Orange glass, shifts to a Blue, while the Blue changes to a Pink and the Violet to a Green. Depending on the surface the objects sit on, they reflect and refract light, changing colour through out the day. At night time they glow.