Calcite with sand inclusions

Fontainebleau, Seine-et-Marne, Île-de-France  France

Specimen size: 7.2 × 6 × 5.8 cm = 2.83” × 2.36” × 2.28”
Main crystal size: 2.7 × 2.2 cm = 1.06” × 0.87”