Victorian Gold Gilded Citrine Brooch Pin

circa 1850-1880, the central oval mixed cut citrine stone, 13 x 10 mm, overall 36 x 25 mm unmarked but acid tests as 9ct gold but has some lost of the plating and has one part that seems to be repaired ( seen at the back of the brooch) 5.5 grams gross weight. Condition surface scratches, signs of soldering otherwise good condition. Please refer to the pictures as they are part of the description