1920s Onyx Lion Intaglio Pendant black opal take for example an advertised

take for example an advertised attraction from the 1933 fair for "Oso the Bear Boy"

The seals often feature a base with carved agate or similar which would have been added by a jeweller after the item left the workshop

It's also pretty addictive to idle-mindedly play with in a sort of 2017 fidget spinner type way

Signet Cartier

1920s Onyx Lion Intaglio Pendant black opal take for example an advertisedDATE: Art Deco, c. 1920 Striking antique fob pendant dating from the 1920s. The main feature is an oval onyx panel, intaglio carved with a lion and mounted in a 14 karat gold collet setting. Originally designed to be worn on the end of a pocket watch chain, it'll make an excellent pendant or even work well as a large charm. STONES Onyx MEASUREMENTS 1. 7 x 1. 9cm (not including jump ring) WEIGHT 2. 9g MARKS Stamped 585 (later added) CONDITION Very good