Melt/ cast picric acid-mononitronapthalene.Called Trimonite
likely about the time our great great grandfathers migh have been Miners.Still listed in the VOD MPS lists.7048 MPS 1.6gr cc3.Might be some info in
Davis or Urbanski.The only brief reference Ive seen i believe dated from the late 19th century.Although i believe its mentioned in Urbanski vol 3?.
PA/DNN?