James St. John:
Galena-quartz-chalcopyrite (Ianakiev Mine, Rhodope Mountains, Bulgaria)
James St. John:
Galena & quartz (Deveti Septemvri Mine, Madan Mining District, Bulgaria)
James St. John:
Sphalerite on galena (Bulgaria) 1
James St. John:
Sphalerite on galena (Bulgaria) 2
James St. John:
Sphalerite on galena (Bulgaria) 3
James St. John:
Sphalerite on galena (Bulgaria) 4
James St. John:
Sphalerite on galena (Bulgaria) 5
James St. John:
Sphalerite on galena (Bulgaria) 6
James St. John:
Sphalerite-quartz (Krushev Dol Mine, Madan Mining District, Bulgaria)
James St. John:
Calcite-limonite-quartz (Droujba Mine, Plovdiv Oblast, Bulgaria) 1
James St. John:
Calcite-limonite-quartz (Droujba Mine, Plovdiv Oblast, Bulgaria) 2