Antique Pearl Diamond and Silver Upon Gold Brooch Cum Pendant, Circa 1890

A Victorian pearl and diamond brooch-cum-pendant, with a natural bouton pearl in the centre of a cluster of  old-cut diamonds, with a surround of alternating single, old-cut diamonds and trefoils, set with old-cut diamonds, in cut down settings, with a removable pendant fitting, set with two old-cut diamonds, mounted in silver-upon-gold, with a removable brooch fitting, stamped 9CT, in an R. Drummond & Co., Glasgow, fitted case, circa 1890. The estimated total weight of diamonds is 5 carats. The pearl measures approximately 8.5mm. Accompanied by a later trombone chain.