Dating to the late Victorian Era, approximately 1880 – 1900.
Most likely Australian Made.
You’ll find the worn remains of an antique 18ct hallmark on the outside of the band (purity verified by XRF test) – an unusual place to find a hallmark on an Australian made ring. It narrowly escaped being chopped out during a resize many moons ago – you can see evidence of the resize from inside the band.
The horseshoe head of the ring measures 9.6mm x 8.8mm. The solid round cabochon opal measures 4mm in diameter, and sits 4.4mm high on the finger.
It is a small size UK/Aus H1/2
US size 4.25
a little resizable.