1 Composition of amber glass 2 Composition of yellow glass 3 Composition of blue glass 4 Composition of green glass

1 light yellowish to deep reddish brown, carbon and sulphur or iron and manganese dioxide 2 Compounds of cadmium and sulphur 3 Various shades of blue, cobalt oxide or occasionally copper (cupric) oxide 4 iron oxide, manganese dioxide and chromium dioxide