Very sharp tetrahedral crystals of Tennantite-Tetrahedrite (Series), with very bright luster and a very lively metallic iridescence, probably due to the superficial presence of Chalcopyrite, on matrix, with lenticular crystals of Siderite. The main crystal has a fractured corner.
The back of the specimen bears an old label with part of the locality. Comes from the old collection of Robert-Auguste Touchon.
Clausthal-Zellerfeld, Goslar District, Harz, Lower Saxony/Niedersachsen Germany
Specimen size: 4 × 3.2 × 1.7 cm = 1.57” × 1.26” × 0.67”
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