What do hummingbirds and opals have in common? Their riot of iridescent rainbow hues of course.

Cut en cabochon, the surface of this singular Australian opal creates a flicking patchwork of azure, apple green, sugarplum, and hints of ember orange and buttercup yellow.

At an impressive 5.10 carats, it feels silken in its dome of color. A 14k setting and smooth bezel cup the gemstone in a snug embrace.

Knuckle to knuckle, its size and varied palette will please the October birthstone aficionado or any natural opal lover.