Halite from Poland - cabinet size
Halite from the famous Bochnia Salt Mine in Poland which is is one of the oldest salt mines in the world and the oldest one in Poland. In 1981 it was declared a heritage monument. In 2013 the mine was added to the UNESCO World Heritage List.
10 cm x 7 cm x 4 cm
Halite is a salt mineral, so never wash it with water, otherwise it will dissolve. If you want to clean it, use a hairdryer on a low temperature. The "Gemstone and Mineral Data Book" by John Sinkankas recommends for halite: "Clean with saturated solution of table salt or with nearly pure alcohol"