Dichroic glass contains multiple layers of oxides and or metals which give the glass its optical properties.
The glass has the special property of reflecting one colour and refracting light of another colour.
This makes the glass display an array of different colours that will also change with the angle of view.
A number of ultra thin layers of different oxides (aluminium, titanium, magnesium, chromium) and metals (silver / gold) are vapourised in a vacuum chamber by an electron beam. This creates a vapour which condenses onto the surface of the glass in the form of a crystal structure.
A finished piece of this glass may have up to 50 layers deposited during the manufacturing process.