Symbol of Prosperity from the 19 century hand carved shell Embedded in the Silver filigree Brooch from 1930th

Symbol of prosperity & love from the 19 century. Hand carved shell depict woman spreading roses in the sky. Embedded in 1920-1930 unmarked filigree Silver Brooch covered with patina. The total measures is 28 mm. by 36 mm. Weight is 4 grams. Need some cleaning