Gypsum

Rich specimen of longprismatic and waterclear, transparent and highly lustrous striated gypsum crystals with swallowtail twinnings and a second generation of firework-like bursts of thin gypsum laths from the Hallstatt salt mine in Upper Austria.

Size: 12.7 × 12 × 5 cm

Locality: Hallstatt Salt Mine, Hallstatt, Gmunden District, Upper Austria, Austria