Picture frame brooch in yellow gold, low-key gold, blue enamel and diamonds

MATERIAL: yellow gold, low-grade gold, blue enamel and DESCRIPTION: portrayed brooch made with a large blue enamel boulle centered by a star with old-cut diamonds in the center, opening glass at the back, on a base made of a flower embellished with roses of diamond, three flowers as pendants MEASURES: diameter 4.8 cm WEIGHT: diamonds 0.45 ct, gr 28.2