Dance is an articulated form that joins segments with different textures and movement on its floating disc at top captured by the bail. 
An Australian opal -it seems darker in the pictures; it reflects light in a way that seems a stronger color than for the eyes.- adds a pinch of color and a small flame to this light to medium weight pendant with artsy vibe.
It measures no counting floating bail 71 x 60 mm approx.
To polish keeping the patina under the relief areas, just use a soft nails buffer flat and it will highlight the relief if the natural patina covers it with use. Toothpaste and brush might remove All the natural patina -and scratch the opal-.