Webster's Online Dictionary:
Gritstone
Noun
1. A hard coarse-grained siliceous sandstone.
Gritstone is a sedimentary rock composed of coarse sand grains and is a coarser version of sandstone.
Gritstone is usually laid down in water and frequently shows signs of cross bedding or current bedding.
It is quarried for building materials. Peak District Gritstone was used for grinding wheels in the cutlery industry. This gives rise to it's other name of Millstone Grit.
Russian - крупнозернистый песчаник
(http://www.websters-online-dictionary.org/definition/gritsto...


Vukićević B, Građevinski rečnik:
gritstone - brusni točak, krupnozrni peščar (geo)


“Sveučilište u Zagrebu - Građevinski fakultet
…
5. Površinski (nadzemni) iskop tla i stijene
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tablica 5.3.7: Utrošak šiljak za struganje («pikova») ovisno o vrsti stijene
glina
pjeskoviti lapor
lapor
glineni škriljac
krupnozrni pješčenjak
gips
lapor
lapor/alverit “
(http://info.grad.hr/!res/gf_osoblje/1033044848/doc/2. knjiga...