This is a lovely Australian Yowah Opal ring accented with 18K Gold balls around the stone. The color of the opal is blue, brown and a bit of white. The silver has been textured and oxidized to bring out the design. The underside is stamped with the hallmark and marker's mark.
The measurements of the top of the ring is 1-1/4-inches by 1-1-/8-inches.
For wider bands, you usually need about 1/4 size or more larger if the band is very wide.