AgAu Jewellery has dated this piece to the Georgian era.

Metal: 18ct yellow gold
Stone(s): 8 x diamonds, totalling (0.65ct), 1 x Ceylon sapphire (0.50ct)
Measurements: Ring face 8mm x 8mm
Hallmark: Tested for 18ct
Size. Size L
Weight: 3.4g
Condition: Very good condition
AgAu Jewellery has dated this piece to the Georgian era.
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