Microcline with Prehnite and Calcite

Navazales Quarry, La Cabrera pluton, Valdemanco - Bustarviejo, Comarca Sierra de Guadarrama, Community of Madrid  Spain (04/2001)

Specimen size: 11.1 × 8.6 × 7.3 cm = 4.37” × 3.39” × 2.87”
Main crystal size: 6.6 × 5.1 cm = 2.60” × 2.01”