Presenting a new find of acanthite from the famous mexican silver locality, Las Chispas! Historic mining ended here in the early 1900's, and no new material has been produced until early this year when a new mine was opened in the district. This material has been analyzed having monoclinic structure, suggesting these specimens are primary acanthite, instead of the much more common paramorphs of acanthite after argentite. The crystals are mainly elongated and skeletal, however some display platy crystals and hoppered growth with associations of quartz and calcite.
