Victorian 18ct Gold & Banded Onyx Oval Pendant With Locket Back

A very striking 18ct75% pure gold (or 750 parts pure gold and 250 parts other metals) gold and banded onyxOnyx is an opaque black variety of polycrystalline chalcedony quartz.  oval pendant with a locket section to the reverse. It is suspended from a white and black enamelA pigmented glass-like material used in powdered form and fused onto the metal surface of a piece of jewellery. baleA component of certain types of jewellery, mostly necklaces, that is used to attach a pendant or stone to a chain.  . It was made circa 1880.