Limestone is of rather low value, but nevertheless it is probably the most important mineral. It is mined and used in large amounts, which often conflicts with the protection of karst areas and caves.
In history man used first the flint nodules, which are common in limestone. Later, after he became resident he used the rock for building purposes. Various kinds of limestone and marble were used for walls, pillars and much more. The soft rock was used to produce sculptures. Even limestone roofs and floors were built.
With the increase of technology many more usages of limestone were found. It is burnt in kilns to produce lime, white wall color, and finally cement for concrete. It is needed to produce glass, porcelain, or as addition in the melting of many metals. It is used to purify coal and the waste gas of power plants using carbon based fuel. Limestone neutralizes many toxic substances, especially sulfur oxide and sulfur dioxide. In combination with sulfur it is converted into gypsum.
Limestone is typically quarried, as it occurs in huge sedimentary layers, and as mining is to expensive.
Grotten Van Kanne, Belgium
Velká Amerika, Czech Republic
Solvayovy Lomy, Czech Republic
Felsendome Rabenstein, Germany
Tytyri Gruvmuseum, Finland
Carrières de la Lie, France
Le Troglo des Pommes Tapees, France
Champignonnière du Saut-aux-Loups, France
Fertőrákosi Barlangszínház, Hungary
King Solomon’s Quarries, Israel
Cava 177, Italy
Cava del Piastraio, Italy
Galleria Ravaccione, Italy
La Fornace di Barbablù, Italy
Duivelsgrot, Netherlands
Dalen-Kjørholt Gruve, Norway
NOAH Langøya, Norway
Daugbjerg Kalkgruber, Denmark
Mønsted Kalkgruber, Denmark
Tykarpsgrottan, Sweden
Odessa Catacombs, Ukraine
Elliott Underground Quarry, United States of America
Rolla Experimental Mine, United States of America
Louisville Mega Cavern, United States of America
Mines & Meadows ATV Riding Resort, United States of America
SubTropolis, United States of America