Mineral: Siderite, Quartz (variety chalcedony), Quartz
Locality: San Valentín open pit, Sancti Espíritu, Sierra Minera de Cartagena-La Unión, La Unión, Comarca Campo de Cartagena, Region of Murcia (Murcia), Spain
Dimensions: 4 x 3 cm

Description: Nice piece with brown to golden-yellow Siderite crystals and a thin layer of sky-blue Chalcedony on clear Quartz crystals.

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