A well as finished tools, irregular flakes, which were a by-product of local tool processing, are often found at prehistoric sites (10,000 – 5,500 BC). These flakes of grey-coloured flint attest to the use of local flint deposits, such as those from Col dala Pieres. Flint (Ladin: piera da fuech) was also used for lighting fires, which is why it is sometimes called firestone.

Small worked flint pieces (microliths) were excavated at the large dolomite block know as the 'Cionstoan' (Ladin: Sas dla Stria), which is the oldest hunter's shelter yet discovered in South Tyrol. They were parts of the throwing weapons and arrows of Mesolithic hunters. In addition to flint, quartz was also used, though less frequently. This transparent mineral may have been attributed with magical significance.

In the Paleolithic and Mesolithic periods (10,000 – 5,500 BC), most tools were made from stone, primarily flint (Silex), which is widespread in the Alps. Tools such as blades, scrapers, burins, awls, and small arrowheads (microliths and trapezoidal points) were created using specific techniques. In addition to more common tools, the Columbella rustica (sea snail) shell was also discovered at Plan de Frea, which is the most important Mesolithic excavation site in the Southern Alpine region.