Watch a video of this specimen by following the Vimeo link below: https://vimeo.com/1118451703/dc4cd2bc59 The Ferques-Marquise quarry, located in the Boulonnais region, is the largest materials quarry in France. Here is a good quality and representative specimen featuring lustrous calcite scalenohedrons decorated with sparkling pyrite. Ex coll. O. Fumery. O. Fumery gathered up over 30 years an extensive collection of about 600 accurately selected French minerals, including rare localities and outstanding regional specimens.