This is a shaped and polished oval, ready to mount or display, natural Welo opal from the mines of Ethiopia.
It is high domed, approx. 11mm by 10mm, 4mm thick and of 2.20 carats.
This opal has a pale grey semi-transparent background colour, with rolling flashes of green, yellow, red, blue and orange radiating from within the crystal itself.
A beautiful unique stone, which would make an unusual ring, pendant or simply kept as a mineral sample.