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.
- B - for solid minerals - mine in building process, for fuels - prepared for exploitation or trial period of the exploitation
- E - exploited
- G - underground natural gas storage facilities
- M - deposit crossed out of the annual report of mineral resources during analized period
- P - deposit covered by preliminary exploration (in C2+D category, for fuels – in C category)
- R - deposit covered by detailed exploration (in A+B+C1 category, for fuels – in A+B category)
- Z - abandoned deposit
- T - deposit exploited temporarily
- K - change of the raw material in deposit
Prepared by: Elżbieta Tołkanowicz