Calcite with sand inclusions

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

Specimen size: 5.8 × 3.8 × 3.7 cm = 2.28” × 1.50” × 1.46”
Main crystal size: 1.9 × 1.4 cm = 0.75” × 0.55”