According to archaeological research, there was a specific culture, called by archaeologists the Lengyel culture, 7 thousand years ago, or roughly 5 thousand years before our era. The name of this culture comes from the village of Lengyel located in Hungary, a small Hungarian village, but... the name of this village translated into Polish means Pole or Polish.
This culture covered areas of present-day Poland (Silesia, Lesser Poland, Greater Poland, and Kuyavia), Czech Moravia, western Slovakia, western Hungary, and a chunk of territory in present-day Austria, Slovenia, and Croatia.
Is the name of the Lenin culture or the Polish culture is to emphasize primarily the large area of Poland covered by this culture? Or was it just a coincidence that the culture was called "Polish", as it was thoughtlessly rooted in this very place name? Or maybe someone decided that the saying Pole and Hungarian are two pals has older roots than the Middle Ages? Has some archaeologist decided that the legend that Lech, Czech and Rus came from the southern (and very mysterious) land of the Karantan tribe has some basis in ancient times? It is hard to say what the scientists are really guided by.
As archaeologists prove, the Lendzielska culture evolved later (in the Neolithic) as the culture of the funnel-shaped cups in Kujawy, the culture of spherical amphoras in other parts of Poland (also in Moldavia, Volhynia, Podolia) and finally in the Bronze Age as the mierzanowicka culture (from the village Mierzanowice near Opatów).
And what is further claimed by archaeologists (who may not always, but sometimes we can trust) is the use of striped flint by the people of those cultures, the basin of which is located in the present Świętokrzyskie voivodeship.
Striped flint is an ornamental stone of beige-grey color, found only in Poland, in the region of the Świętokrzyskie Mountains. It is a mixture of chalcedony, opal, calcium carbonate and quartz. It is characterized by an interesting arrangement of dark and light streaks, creating attractive patterns. Inhabitants of the Świętokrzyskie Mountains region have been acquiring this stone for thousands of years. They used it as early as the Neolithic Age and the early Bronze Age, mainly to make axes, chisels and amulets.
Traces of ancient striped flint mining have been found, among others, in Krzemionki Opatowskie (entered on the UNESCO World Heritage List in 2019). Items made from it were found within a radius of several thousand kilometers, and were probably traded. The ability of flints to resurrect fire led to them being attributed symbolic and even magical significance.
Due to its decorativeness and appropriate hardness (6.5 - 7 on the Mohs scale, harder than opal or malachite, slightly less hard than emerald, as hard as tanzanite), since the 1970s the stone has been used as a jewellery stone (it is also sometimes called "Polish diamond") and its jewellery utility is increasingly appreciated worldwide. Some even claim that striped flint is a source of energy and vitality, ensures a good night's sleep and call it "the stone of optimism". Be that as it may, jewelry obtained from striped flint is becoming increasingly popular among women of all ages adding a magical charm to women.
(Translated with www.DeepL.com/Translator)