AgAu Jewellery has dated this piece to the Edwardian era.

Metal: 18ct yellow gold.
Stone(s): 1 x ruby (0.10ct), 2 x diamonds, totalling (0.10ct)
Measurements: Ring face 13mm x 6mm
Hallmark: Marked for 18ct, C.1906
Size. UK Size L
Weight: 2.0 g
Condition: Very good condition
AgAu Jewellery has dated this piece to the Edwardian 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