This is a solid Black Opal from Lightning Ridge, New South Wales, Australia. It shows Green and Blue colours. It is ready to be set as a very lovely ring stone or as a pendant in an open back setting. N3 with a Brightness rating of 4.5.
If you see an opal on this website that you might like to have as a pendant, please contact Peter to discuss if it is possible with that particular stone.
You also need to state if you wish to have a bail fitted or not. If you do, then you would need to be charged for the cost of metal, silver or gold.