This is just pure sunshine in jewellery form. 
An antique heart cut citrine set in 15ct gold with bobble surround. The cut of the stone is voluptuous, with a deep cleft to the heart. 
Converted from a stick pin, with a 5mm jump ring added in our usual style. 
Circa 1900.
Stamped and tested as 15ct gold. 
Weight approx 1.04g
Total drop approx 15mm
Width approx 10mm
Excellent antique condition