Description
Light blue-gray, brownish Boracite “tetrahedrons” (Boracite is orthorhomic!), sharp and gemmy up to 0.4 cm are associated with sparkling Pyrite. A fairly rare species from a former Potash mine of many uses ... Potash has been recovered since 1895 for almost 100 years, before sections were turned into a visitors mine, a hazardous waste depot and recently (2006) into a Halite mine.