People have asked for boulder opal.
Here is your chance to get some great material. Most pieces will cut stones.
Don't forget you do need skill to cut this, as a lot of the faces are undulating and you need the skills of a carver to finish this material.
I was lucky to get this material for a good price.
When I buy well it is passed on. Mind I am tempted to just cut it myself but then you would not have had a chance yourself to play.