AgAu Jewellery has dated this piece to the 1950s.

9ct yellow gold heart shaped stud earrings
Tested for 9ct gold and marked for 375 (9ct)
Stones: Amethyst (0.15ct or 15 points) in each stud and Diamond (1 points)
Total Earring Length: 7mm.
Total Earring Width: 7mm
Weight: 1.1g
The earrings are in very good condition
AgAu Jewellery has dated this piece to the 1950s.
Agau jewellery offer an extensive range of 9ct and 18ct gold jewellery.
You can view the stock and full dealer information on the AgAu Jewellery Profile Page