Uschuya recanted his claim that he had found them and instead admitted they were hoaxes, saying "Making these stones is easier than farming the land." He engraved the stones using images in books and magazines as examples and knives, chisels and a dental drill.
Thus, a stone of uncertain origin can never be used to establish a conclusion which would otherwise be considered unlikely.
Uschuya, after claiming them to be real ancient artifacts, admitted to creating the carvings he had sold and said he produced a patina by baking the stone in cow dung.
As a result of weathering, they have developed a thin patina.
Archaeological remains show evidence of Peruvian cultures going back for several thousand years.
At some later stages, the whole of modern Peru was united into a single political and cultural unit, culminating in the Inca Empire, followed by the Spanish conquest.
In 1977, during the BBC documentary Pathway to the Gods, Uschuya produced an Ica stone with a dentist's drill and claimed to have produced a fake patina by baking the stone in cow dung.
For this reason, ICA treats each one of your samples with special care to determine the best applicable protocol.In September 1966 in Uhle Hill cemetery, De la Banda sector, Ocucaje District, they found, for the first time, an engraved stone with certain provenance in a tomb of the Paracas culture.This stone was fairly flat and irregular in shape, approximately 7 cm × 6 cm × 2 cm (2.76 in × 2.36 in × 0.79 in) in size.None of them reported the discovery of carved andesite stones.Nevertheless, carved stones which had been looted by huaqueros, grave robbers, began to be offered for sale to tourists and amateur collectors.