4N47: Parallel growths of doubly terminated and polycrystalline, scalenohedral Calcite crystals with a slightly yellowish color and of considerable size, with very well defined faces and edges, from a mine that was very famous for its Fluorites.
Coroña Shaft, Josefa-Veneros Norte vein, La Collada mining area, zona minera de La Collada, Siero, Comarca Oviedo, Principality of Asturias (Asturias)  Spain (1980)

Specimen size: 21.2 × 16.7 × 5.5 cm = 8.35” × 6.57” × 2.17”

Main crystal size: 18.7 × 12.3 cm = 7.36” × 4.84”