Agate Necklace.
Agate Necklace, Achaemenid Artwork, c. 350 BC. From a Princely Tomb in the Acropolis of Susa. Louvre.
Agate_Brooch_Scottish
Jewelry from Scottish agate came into fashion after Prince Albert bought Balmoral Castle in 1848 and many lovely examples of this type are highly coveted by collectors today.