Bournonite on siderite – "Georg" mine, Horhausen, Germany
 Former C. Prager Collection, Celle
 Ex Anton Berger
 A historic, richly decorated bournonite collection specimen from the Rhineland. The metallic-blue, lustrous crystals contrast beautifully with the yellowish siderite crystals.
 Wonderful collection piece in a special size and excellent quality.
 This rare collection piece comes from the former inventory of the famous Austrian mineral dealer and collector Anton Berger.
 https://mineralogicalrecord.com/biographies_labels/bergeranton/