according to the Lancet, green blobs are potassium carboxylates. there is a process of peer review and a context in this article.
the link shows pictures of green blobs and a chemical analysis, but no microscopy. very much less information than the Lancet article therefore the Lancet article is stronger.
the Lancet article makes more sense. the physicochemical properties of the green blobs fit with "soapstones" but not genuine gallstones
BTW that report DOES NOT state the blobs are calcified gallstones! so don't misquote it
your misunderstanding is just a demonstration of the level of scientific literacy in the general population. to clarify this we would have to (like we can with the article) speak to the producers of the report. were they actually saying these were gallstones? the language is reminiscent of radiology reports - consistent with means it could be but it also could be many other things. hedging in other words