A carved antique style cameo ring, 1st half of 19th century

yellow gold, silver (unmarked),  the oval pink and blueish shell cameo carved with a head of a beaded man, the border set with 36 diamonds in old cuts weighing in total approx. 0,30 ct J-K/SI-P, with cast foliate motifs to the shanks, size: 15, weight: 5,35 g; sold with a box