Bottle glass

Bottle glass

Bottle glass

A common, naturally colored, greenish or brownish glass. The color is characteristic of glass that includes traces of iron found in the silica used as the major ingredient. Such glass is inexpensive to produce, and it is used for such items as bottles, when good quality is not essential. Sometimes, additional iron, in the form of iron oxide (or other materials), is employed to darken the color.

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