Mercury Glass
ft_mercglass01.jpg What is Mercury Glass? Mercury glass, also known as silvered glass, contains neither mercury nor silver. It’s actually clear glass, mold-blown into double-walled shapes and coated on the inside with a silvering formula, which is inserted though a small hole that is then sealed with a plug. A few manufacturers did, for a time, try to line their glass with a mercury solution; this practice was discontinued due to expense and toxicity, but it helps explain the origin of the misnomer....