It depends on the glass. Some glass is literally stained; that is, painted with a transparent dye. Some glass is colored internally by the presence of small amounts of transition metal compounds. Cobalt, for example, gives a characteristic deep blue; copper can produce a pale blue, and the pale aquamarine of a glass Coke bottle is due to small traces of iron. Finally, some glass is colored by the deposition of an extremely thin film of metal of a very precisely controlled thickness. This is called dichroic glass, and is interesting because the color results from the reflection of certain frequencies rather than absorption. The glass therefore doesn't heat up as much, making this a very popular method of generating color from high-powered theatrical lights (the moving colored lights in rock concerts often use dichroic glass).
This is a colored glass.
Small pieces of colored glass are called "mosaic tiles."
A Coke glass is made out of colored glass.
A cup can be transparent if it is made of glass or acrylic. Other cups may be opaque or have a colored or patterned design that makes them not transparent.
Stained glass.
Glass is colored by adding certain metal oxides or compounds to the raw materials during the manufacturing process. Different colors in glass are achieved through various methods such as adding cobalt for blue, manganese for purple, selenium for red, and iron for green. Additionally, glass can be colored through techniques like overlaying different colored glass layers, using colored enamels, or applying metallic coatings.
CHEMICALS
Neal A Vogel has written: 'The preservation and repair of historic stained and leaded glass' -- subject(s): Art glass, Colored Glass, Conservation and restoration, Glass painting and staining, Glass, Colored, Preservation
Colored glass has been found in Egypt, made during the 18th dynasty, i.e. 16th - 13th centuries BC.
inks and dies are added to glass when it is in powdered form, then mixed in
The color is a bit of swirled colored glass.
Unless it`s colored glass, it will still shine its original color.