The brilliant Dichroic optical properties of Dichroic glass are the result of multiple micro-layers of metal oxides. These thin layers of oxides have a total thickness of three to five millionths of an inch.
NASA developed Dichroic glass for use in satellite mirrors. Multiple ultra-thin layers of different metal oxides (gold, silver, titanium, chromium, aluminum, zirconium, magnesium, silicon) are evaporated on to the surface of the glass in a vacuum chamber.
The resulting plate of Dichroic glass can then be fused with other glass in multiple firings. Certain wavelengths of light will either pass through or be reflected, causing an array of colors to be visible. Due to variations in the firing process, individual results can never be exactly reproduced, each piece of fused Dichroic glass is unique