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The element that is used to make pink glass is selenium. This element is also used to make glass that is red in coloring.
The key element in cement and glass is silicon.
The word "glass" is used in a technical sense in materials science to refer to a type of amorphous solid. The type of glass used for windows and such is usually "soda-lime glass", which is primarily oxygen and silicon, with lesser components of sodium and calcium, and may contains small amounts of iron (which tends to give the glass a greenish tint like the characteristic "Coke bottle green"; if this is undesirable, manganese is sometimes added in small quantities to counteract it), magnesium, potassium, titanium and aluminium. That covers the "glass part".There are several ways to impart a pink color to the glass. A very small amount of metallic gold (about 10 parts per million) will color glass a deep ruby red; lower concentrations will result in a pinkish color (often called "cranberry glass"). Elemental selenium can also be used to make red and pink glass, and erbium oxide, which is pink, may be added to glass to give it a pink tint.
CaCO3
glass
Praseodymium
The element used to make pink in a firework is CaCO3
bismuth bismuth bismuth
antimony
antimony
boron
Silicon ... or more correctly silicon oxide.