Rock paintings! These are being sold in friend's agritourism farm in the Carpathian Mountains as souvenirs. They sell really good ; >. This is just acrylic paint but on real rock(mostly sandstone)brought from this region.
It's very graceful for painting as it breaks in thin plates(0,5-1cm thick) and the rock texture makes the painting very lively. It is delicate though. Some of the rocks contain some pieces of wood or other fossils, and other are stained red with iron, a real treat for the amateur archeologists c;

These are the nicest, more from the batch can be found on my Patreon along with other goodies https://www.patreon.com/bluari

Old ones http://www.furaffinity.net/view/12422406/ And more can be found on my all-art-drawer DeviantART page.