An early 19th century ivory and diamond brooch and a late 19th/early 20th century diamond and enamel brooch

An early 19th century ivory and diamond brooch and a late 19th/early 20th century diamond and enamel brooch
The first with carved ivory floral spray beneath a glazed cover to an old-cut diamond border, mounted in silver and gold, circa 1820; the second modelled as a heart, the pear shaped blue guilloché enamel panel with applied rose and old-cut diamond floral spray, to an old-cut diamond surround with folded surmount, circa 1900, some enamel loss (2)