Calcite with sand inclusions

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

Specimen size: 4.4 × 3.5 × 2.2 cm = 1.73” × 1.38” × 0.87”
Main crystal size: 1.8 × 1.7 cm = 0.71” × 0.67”