Wow, if those stones are formed from the olive oil, they sure do produce quickly. On my last flush, my biggest stone was comprised of about 8 stones well fused together. Let them sit out a bit and you can see where they are joined. I don't think most labs are equiped to analyse them they've never had a reason to develop a concrete method. They are in the business of taking them out so why would they build a case on keeping them in. It just doesn't serve their interest. If we were all wrong, they would be the first ones to let you know! They wouldn't hold back on that one!
No one wants to be pinned as the doctor who said yes they are gallstones.