Calcite with sand inclusions

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

Specimen size: 8.6 × 6.7 × 6.7 cm = 3.39” × 2.64” × 2.64”
Main crystal size: 1.5 × 1 cm = 0.59” × 0.39”