Say hello to Exalos, a giant air dragon! His egg is very large - this would best suit a medium to large finger (at least a size 6.5) to see the scale texture of the band. His egg (Mexican cantera fire opal) is a beautiful warm tan color with a wonderful display of rainbow sparkles in the white center.
Please see the other photos and video to view the color changing properties and the size of the opal against the band on a finger.
The finished ring will include a sterling silver bezel around the opal, as seen in the example photo.