US$15 …. I'll sell you stuff like that for AU $10 …. or you could just do a ebay search for "agate geode slice" and get your own for a couple of bucks ...just ordered this and really looking forward to it arriving, from the same smith who did the one above (damascus striker) ramshead damascus striker, Adam is a really talented smith and is doing strikers unlike any I have seen.
he also has some beautiful flint (I actually think it is chalcedony) for sale I am going to have to get, though it is US$15 of each piece so holding off at the moment. It would be too nice to strike on I am thinking.