AgAu Jewellery has dated this piece to the 1950s.

Diamond Quality
Cut: Brilliant
Colour: H-I
Clarity: VS2
Carat: 0.20ct
Metal: Pendant 18ct yellow gold.
Stone(s): 1 x aquamarine (7.00ct), 1 x diamonds (0.20ct)
Measurements: Pendant 28mm (inc bale) x 11mm, Chain 20"/50cm
Hallmark: Pendant Tested for 18ct gold,
Weight: 1.8g
Condition: Excellent 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