The so called „silver plated” glass (mercury glass) was very popular in the 19th century, it was developed in Germany at the beginning of the century. It was purchased instead of real silver, because of its silvery shine by those who couldn’t afford the real ones.
In spite of its name, it doesn’t contain any pure silver or mercury. Double layered object was blown of glass and silver nitrate was injected through a small hole between the layers, then the hole was closed. For example, candle holders, doorknobs, jugs, goblets and vases were made this method. They soon became popular in England, France and in the USA also. After a short break, it became fashionable again around 1900 thanks to the Christmas ornaments and faux fruits made of it. Even colored variations appeared in the 20th century.
Collectors are still looking for original pieces. If the air gets in between the two layers, the silvery coating oxidizes and becomes freckled. In order to prevent this, the original seal (lead or wax) on the hole shouldn’t be harmed.
We can make silvered glass replica DIY. Fill a spray with water and vinegar in 1:1. Spray the desired object with „mirror” paint. Let it dry for one or two minutes, then spray the surface with the vinegar mix. Push it around with a paper towel. This not only soaks up the surplus but the desired cracked mirror effect is created this way too. Let it dry completely.
These decorating objects fit very well to the elegant and country classic styles also. In case of uncertainty, ask for help of an interior designer for the decoration.