Corvidae Antique has dated this piece to the Victorian era.
The bezel directly around the stone is rose gold, the rest of the ring is yellow gold, all solid nine carat.

In excellent antique condition.
Marked 9CT.
Size: Q (UK), 8 (US). The garnet is 1cm wide and the round face of the ring measures 1.3cm across. The ring sits around 6mm above the finger and the shank is 2mm wide at the back.
Weight: 3.7g.
Corvidae Antique has dated this piece to the Victorian era.
Hand picked jewellery from a friendly family business
You can view the stock and full dealer information on the Corvidae Antique Profile Page