"Watch a video of this specimen by following the Vimeo link below: https://vimeo.com/1149537490/8e0ce91a98 Fine large baryte septaria specimen. Baryte-containing septaria are quite rare in France and found only in a few areas. Usually the calcite core has to be dissolved for the baryte crystals to appear. A fine representative example of this material. Ex coll. Jean-Louis Gérard. J-L. Gérard was a collector with many interests, ranging from maritime objects to paintings, and from antique scientific instruments to minerals! Over several decades of collecting, he gathered tens of thousands of items in his family estate located in the Loir Valley. The recent sale of the estate and the collections was a major event."