Vintage Jewellery Installation Butterfly, Circa 1970s

18K yellow gold brooch in the shape of a butterfly set with a south sea pearl and diamonds on schist plate in wooden frame.

Dimension: Frame: 20.3 (L) x 24.3 (W) x 5.5 (D) cm.
Dimension Brooch: 3.70 (L) x 4.84 (W) x 1.26 (D) cm.
Material: 18K Yellow Gold
Diamonds: 1.50 ct. 
Blue Diamonds: 0.18 ct.
South Sea Pearls: 2.85 g. 
Brooch Weight: 18.5 g./ Frame Weight:
Year: 1970s