A scintillating Opal cabochon from Welo, Ethiopia.

This large gem has a dark grey-black background against which the opalescence stands out in sharp colours.
The gem displays a range of vivid colours as it is tilted and spun in the hand, with almost every colour of the spectrum visible from all angles.

To see a short video of this superb gem on YouTube, please use this link:
https://youtu.be/RFQG_viLsMM

weight:  12.66 carats
shape:   Drop shape cabochon
dimensions:  20.29 x 13.26 x 10.64 mm
treatment:  None