Dichroic Glass was developed by NASA for use in their satellites in outer space and was developed to reflect light and keep in the heat.

It is a glass which contains ultra-thin layers of aluminum, chromium, silicon, zirconium or the metal alloy titanium. The colors are almost holographic in appearance. Metallic oxides are bonded to the glass using an electron bombarder inside a vacuum chamber under strict laboratory conditions. This stack of thin layers has a total thickness of three to five millionths of an inch. The layers produce an "interference filter", creating the varied and unique color. Once the coating has adhered to the glass, it is fired in a kiln to make it permanent. The angle of the glass within the vacuum chamber determines the color. In actuality, there is no color produced. What you are seeing is pure light manipulation at it's finest from the thin layers of oxides.Dichroic glass produces both a reflective and a transmitted light. It is this specialty that enhances the beauty and the mystery of dichroic glass, you never really know how the pieces will look and change, under the influences of different lights and backgrounds they are amongst.The appearance of the glass will be different depending on whether the light is reflected or transmitted.