Anhydrite with Rutile on Dolomite

Simplon railway tunnel, Simplon pass area, Brig, Wallis (Valais)  Switzerland (±1950)

Specimen size: 3.2 × 2.8 × 2 cm = 1.26” × 1.10” × 0.79”
Main crystal size: 2.1 × 0.8 cm = 0.83” × 0.31”