Rosell Minerales
RM2862 Chalcopyrite, Sphalerite and Quartz
Casapalca Mine, Casapalca, Huarochiri, Lima, PerúGroup of chalcopyrite crystals, bright, interpenetrated, with well defined edges. On the faces of the crystals we can see small aggregates of crystals, probably tetrahedrite. They are accompanied by sphalerite crystals on matrix. An old piece, from the time of those that are preserved in the Freiberg Mining School Museum.
Size: 6 x 4.8 x 2.2 xm.
Main crystal: 1.7 cm.
Found in ±1985.
Col. Manchion (Barcelona).

RM2408 Rhodochrosite, tetrahedrite, pyrite and quartz
Casapalca Mine, Casapalca, Huarochiri, Lima, PerúOn a rich group of rosettes of rhodochrosite, with a pinkish tone and a silky luster, there are various crystals of tetrahedrite, defined, brilliant and contrasting on the matrix.
Size: 6.7 x 5 x 3.2 cm.
Main crystal: 3 mm. Td
Found in ca. 1985.
Col. J. Astor (Barcelona).

RM1824 Bournonite, boulangerite and
Casapalca, Huarochiri, Lima, PerúGroup of bournonite prismatic crystals, with striated faces by the cyclic twin; interesting acute terminal faces, good brilliance and complete crystals. They are accompanied by bright aggregates of acicular boulangerite and sharp pyrite crystals. They are accompanied by lenticular crystals of possible magnesite or dolomite. A sample purchased by Sr. Manchion from Dr. Joan Viñals, in the 80s. A different piece from this Peruvian locality.
Size: 5.6 x 4.3 x 3.5 cm.
Main crystal: 6 x 2 mm.
Found in 12/1984.
Col. J.M. Manchion (Barcelona). No. 120. J. Viñals, 12/984.

RM1691 Tetrahedrite with chalcopyrite, siderite and quartz
Casapalca Mine, Casapalca, Huarochiri, Lima, PerúVery rich specimen formed by several tetrahedrite crystals, sharp, brilliant, with golden facets due to chalcopyrite. They show forms of the tetrahedron and the cube, together with more complex ones. They are disposed very aesthetically on a matrix covered with quartz crystals and peppered by globular orange siderite. A very esthetic specimen, for lovers of crystallography and sulfides. Analysis show a silver content.
Size: 8.3 x 6.0 x2.7 cm.
Main crystal: 10 x 8 mm.
Analyzed specimen with report

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