See our: lavastone jewelry.
Articles of jewelry, usually a mounted cameo or intaglio, made of the lava from Mt Vesuvius and carved in Italy. The pieces are of a variety of colours, usually pale shades or greys and browns, and the surface is matt. It was a popular form of inexpensive jewelry of the 19th century.
From: An Illustrated Dictionary of Jewelry, autor: Harold Newman, publishers: Thames and Hudson