kwarcytowa
Kwarcytowa is a term of Polish origin, generally referring to something made of, or related to, quartzite. Quartzite itself is a hard, non-foliated metamorphic rock composed almost entirely of quartz. It forms when sandstone is subjected to heat and pressure, usually deep within the Earth. The recrystallization of quartz grains and silica cement causes the rock to become extremely durable and often beautiful, with a range of colors due to mineral impurities.
In practical usage, "kwarcytowa" might describe a product, such as kwarcytowa blaty (quartzite countertops), which are