Flintstones are silica concretion balls of spherical or oval or irregular shape. They usually occur as banks among carbonate rocks of the Jurassic or Cretaceous ages. The main constituent is chalcedony.
Ground flintstones are used in glass nad ceramic industry. They are also used for production of facings, millstones for rolling mills and flint abrasives. Striped flintstones are used to make some jewellery and stone fancy products.
The most famous accumulation is Krzemionki Opatowskie, located near Ostrowiec Świętokrzyski, where flintstones were extracted during 3,500-1,600 BC.
The only two explored deposits of flintstones near Kielce (in the Świętokrzyskie voivodeship) have not been exploited so far. The total anticipated economic resources of these deposits amount to 28 thousand tonnes.
Prepared by: Elżbieta Tołkanowicz