RJ12P8: A Swiss classic with two very well marked phases of crystallization, the first one as a basic single prism having very well defined faces and edges and the second as a polycrystalline termination with a parallel growth of transparent and bright crystals. The quality of the sample is good for the locality.
Pollux Mountain, Matter Valley, Zermatt - Saas Fee, Wallis (Valais)  Switzerland (1952)

Specimen size: 3.2 × 2.3 × 1.4 cm = 1.26” × 0.91” × 0.55”