This is a Yowah Matrix Opal Stone which comes from the Yowah Opal fields of Queensland, Australia. It has been drilled so that it can be fitted with a Bail. This can be done at a small cost. The stone shows pinpricks of Green and Blue set in the Matrix of the brown ironstone.
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.