This is a Solid Natural Boulder Opal from the Koroit Opal fields in Queensland and is classed as a Picture Stone. It has Blue and Purple colour emanating from the brown stone. It is a ready to wear as a pendant with a black leather cord, Sterling silver ring bail and silver plated cord ends included.
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.