Cameo pins are usually carved or engraved stones that are used for brooches or on necklaces. Usually made of onyx or agate with some kind of design in it.

Greece or Rome was the first to make cameo jewelry. It is unknown exactly when the first cameo jewelry was made. Cameo jewelry used to be carved from rock. Later, the jewelry would be made from shells.

Many websites popped up with search results for purchasing agate jewelry. Gem Rock Options, Agate Jewelry, Amazon and Ganoskin are some of the most popular websites.

Blue ice agate can be found in Utah, California, and Oregon.

There are manufacturers that produce ear plugs made out of agate and jasper.