Quartz with Calcite and Siderite

San Valentín open pit, Sancti Espíritu, Sierra Minera de Cartagena-La Unión, La Unión, Comarca Campo de Cartagena, Murcia, Region of Murcia  Spain

Specimen size: 12.2 × 8.2 × 5.8 cm = 4.8” × 3.2” × 2.3”
Main crystal size: 3.7 × 3.5 cm = 1.5” × 1.4”