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RM859   Siderite

Arteal Tunnel, Sierra Almagrera, Cuevas del Almanzora, Almería, Andalucía, Spain

A very rich group of siderite crystals from an extinct locality such as Arteal Tunnel. It occurs as aggregates of lenticular crystals with parallel growths, very bright and deep brown color. In fresh fracture green color siderite is observed. Very aesthetic.


Size: 6.7 x 5.3 x 2.3 cm.
Main crystal: 16 x 10 mm.

 

RM861   Siderite

Arteal Tunnel, Sierra Almagrera, Cuevas del Almanzora, Almería, Andalucía, Spain

A very rich group of siderite crystals from an extinct locality such as Arteal Tunnel. It occurs as aggregates of lenticular crystals with parallel growths, very bright and deep brown color. With a second siderite generation of small sharp crystals. In fresh fracture green color siderite is observed.


Size: 6.7 x 4.8 x 3.5 cm.
Main crystal: 24 x 18 mm.

 

RM140   Jarosite

Arteal Tunnel, Socavón Santa Bárbara, El Arteal, Cuevas de Almanzora, Almería, Andalucía, Spain

Group of flattened tabular jarosite crystals, very sharp and rich in faces, with an intense luster and brown color. We would like to emphasize the transparence and the crystal size.
This sample is from the Arteal tunnel (also known as Santa Bárbara pit), today it is impossible to collect more specimens because tunnel collapsed in first months of 2011.


Size: 7,5 x 6,4 x 1,8 cm.
Main crystal: 2,5 x 2 mm.
Found in 2010

 
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