Mineral: Tetrahedrite with Sphalerite, Bournonite and Siderite
Locality: La Mure area, La Mure, Matheysine-Trièves, Grenoble, Isère, Auvergne-Rhône-Alpes, France
Dimensions: 7 x 9 x 7 cm / main crystal: 6.8 cm.

Description: La Mure, Isère, France Mass: 522 g MIM number: 1384 Probable year of extraction : 1981 Two very lustrous, black tetrahedrons imbricated in the form of a cross (though not at a perfect right angle) with a tuft of dark red, polysynthetic sphalerite (4.6 cm) close to the summit of the larger one, some flat crystals of bournonite (1 cm max) and small siderite lenses at the back (0.9 cm max). Photographer: AINU / Augustin de Valence; Publications: "Le Règne Minéral # 100: Jul-Aug 2011", "Minéraux - Le Guide des Passionnés" Ex collection: Gilles Emringer (France)

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