Measuring 10 x 8 mm, or 1.27 carats, this opal has a very up front play of color where you don't have to move the gemstone much to see an overall color. The play of color is predominately red with streaks of blue and touches of green. Set in a four prong mounting of 14 kt white gold. A round brilliant cut diamond, 0.05 carat, sits just below the decorative ribbed bail. Chain not provided.