Zoisite

Unknown Owner

Pink attractive crystals of zoisite, the variety known as thulite, across the top of matrix. In great condition. This variety of the species rarely shows decent crystals.Leksvik, situated on the Fosen Peninsula in Trondelag, Norway, is home to a notable quarry renowned for its high-quality deposits of thulite, the pink variety of the mineral zoisite. Geologically, the thulite occurs within metamorphic rocks where hydrothermal fluids rich in manganese interacted with calcium-aluminum silicates during the Caledonian orogeny. This infusion of manganese is what gives the mineral its distinctive and vibrant rose-pink to deep raspberry-red coloration. The thulite at Leksvik is typically found in massive form or as dense crystalline aggregates embedded within white quartz or greyish schist, often creating a striking visual contrast. Historically, this site has been a significant source of Norway's national stone, with the material being extracted for use in jewelry, carvings, and decorative lapidary work. While the quarry is primarily a source for ornamental stone rather than individual crystal specimens, it remains a critically important locality for understanding the distribution of manganese-bearing silicates in the Scandinavian crust.