Search Archived Mineral Specimens

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Locality

Tannenbaum mine, Breitenbrunn dist., Erzgebirge, Saxony, Germany

Formula

Cu¹⁺BiS₂

Size

SmCabinet 5.5x6x3cm

Tagged

sulfide , copper

Steely grey prismatic crystals from 1 to 6mm embedded in matrix. Very good and rich specimen.

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Locality

Krupka, Erzgebirge, Bohemia, Czech Republic

Formula

Cu¹⁺BiS₂

Size

Miniature 4.5x2x1.3cm

Tagged

sulfide , copper

Randomly oriented black to grey needles of Emplectite to 2mm with purple Fluorite. Excellent specimen.

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Locality

Tannenbaum mine, Breitenbrunn dist., Erzgebirge, Saxony, Germany

Formula

Cu¹⁺BiS₂

Size

SmCabinet 6x4x2.5cm

Tagged

sulfide , copper

This specimen contains a 1cm vein through the center. On the fringes of the vein are small openings which contain needle-like crystals of silvery and shiny emplectite crystals to about 1-1.5mm.

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Locality

Rex mine, Boulder Co., Colorado, United States

Formula

AgTe

Size

Miniature 4.5x3.5x3cm

Tagged

telluride , silver

Light goldish, granular crystals of Empressite skirting silvery, native Tellurium. The Empressite is difficult to see in the photos.  The Tellurium occupies much of the matrix and occurs in large 4-6mm flashy silvery crystal grains.  Excalibur label. 

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Locality

Tombstone dist., Cochise Co., Arizona, United States

Formula

AgTe

Size

Miniature 3x3.3x3.5cm

Tagged

tellurium , silver

Dull grey to black masses and single crystals rimming Pyrite associated with possible Rodalquilarite.

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Locality

Longfellow mine, Red Mountain, San Juan Co., Colorado, United States

Formula

Cu₃AsS₄

Size

Cabinet 10x7x5cm

Tagged

sulfide , copper

It was tough to get good photos of the Enargite. They are highly reflective with their mirror-like reflectivity. The crystals reach 6mm and there are several of them in a pocket 3.5cm wide. Very nice specimen. Collected by Arnold in 1959.