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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.

 
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