Elizabethan brooch, from the end of the 19th century, in the shape of a circle flower, made of 18 kt

Elizabethan brooch, from the end of the 19th century, in the shape of a circle flower, made of 18 kt yellow gold, with a silver view. It presents a central diamond, old cut of 1 ct., and smaller diamonds, old cut, with a total weight of ca. 3 cents. With pin closure.
The center stone of the brooch is split.
Weight: 19.47 grams.
Measurements: 40.80 mm. (inside diameter).