This is a Solid Opal stone which comes from Lightning Ridge, New South Wales, Australia and is ready to be set into jewellery. It shows Green, Red, Yellow and Orange colours. N7 and has a Brightness rating of 5.5.
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.