Red chalybeate materials (Red artefacts) are called "ochre" or "hematite". During the excavations at the site they were discovered in the form of small lumps and spots of more or less regular outline, a number of them were filled with flint artefacts and stones. The hue, which is classified as red by convention, is in reality more cherry red and cherry pink with shades of red and yellow. Some lumps were modelled in certain shapes or showed intentionally made cuts. Methods applied in mineralogy and organic chemistry allow for a partial reconstruction of their usage in the past and determine their place of origin.
Red chalybeate materials have not only ingraining but also contracting properties useful for medical purposes. They were also used for leather tanning.
Tadeusz Wiśniewski, Barbara Niezabitowska- Wiśniewska (eds.), Klementowice - obozowisko ze schyłku epoki lodowej we wschodniej Polsce /Klementowice - A late Ice Age settlement in Eastern Poland/, Lublin 2013 /p. 13/