Very visible quartz Japan twin law (84°33'), formed by two well developed crystals. Transparence, perfection and with very interesting reddish acicular inclusions of indeterminate species (hübnerite?). From a classic locality very aesthetic piece.

Very sharp dipyramidal scheelite crystals those are coated by lemon yellow stolzite. They are disposed on a flattened hübnerite crystal partially covered by quartz crystals. Pure aethetic specimen.

Very sharp dipyramidal scheelite crystals those are coated by lemon yellow stolzite. They are on a matrix of quartz crystals. A very interesting and aethetic miniature.

Druse of brilliant hyaline quartz crystals, with transparence and well-developed prism. Some of them showing the Japan-law twin, flattened, transparent to translucent. From a classic Peruvian locality which was inaccurated located in Pasto Bueno district, Pallasca province.

Druse of brilliant hyaline quartz crystals, with transparence and well-developed prism. Some of them, one with a good size, showing the Japan-law twin, flattened, transparent to translucent. From a classic Peruvian locality which was inaccurated located in Pasto Bueno district, Pallasca province.

Druse of brilliant hyaline quartz crystals, with transparence and well-developed prism. Some of them showing the Japan-law twin, flattened, transparent to translucent. From a classic Peruvian locality which was inaccurated located in Pasto Bueno district, Pallasca province.

Druse of brilliant hyaline quartz crystals, with transparence and well-developed prism. Two of them showing the Japan-law twin, flattened, transparent to translucent. From a classic Peruvian locality which was inaccurated located in Pasto Bueno district, Pallasca province.

Druse of brilliant hyaline quartz crystals, with transparence and well-developed prism. Some of them showing the Japan-law twin. Well defined, flattened, transparent to translucent. From a classic Peruvian locality which was inaccurated located in Pasto Bueno district, Pallasca province.

A specimen formed by some tetrahedrite crystals of very good size. They show faces of the positive and negative tetrahedron, very sharp and rich in faces. Some of them are coated with a thin golden patina of chalcopyrite, a very aesthetic rarity. They are accompanied by bright calcite that partially cover with a geometrical disposition. A specimen of great aesthetic and interesting by the size of its crystals.

Druse of tetrahedrite crystals with defined faces and edges. Good brilliance, with a metallic-gray tone. They show complex interpenetrating faces. Accompanied by groups of hyaline quartz crystals forming rosettes. Very aesthetic. With sphalerite in the matrix. From a classic Peruvian mine.

A very rich group of tetrahedrite crystals with an intense metallic luster and deep black color, with well defined faces and edges. Faces show complex growth and some vertices are truncated by opposite tetrahedron faces. They are accompanied by groups of sphalerite crystals, complex forms, easily distinguished by its grayish dull sheen. Highlight the intense orange fluorescence of this sphalerite probably due to the presence of cadmium in its crystal lattice. From the Jaqui adit, a diferent locality not well represented in collections.