I have created a Procreate Brush Set with 110 different rock textures. Available for only $5 on my Ko-Fi site. That’s less than 5 cents per brush!
110(!) rock texture brushes for Procreate. This brush set includes many different common and rare sedimentary, igneous and metamorphic rock type textures (such as limestone, basalt, granite, schist, gneiss and migmatite) as well as beach pebbles and rocks, and more. Included (some with multiple different textures): Agate, Albite, Amphibole, Andesite, Basalt, Bauxite, Beach Pebbles, Beach Rocks, Beach Sand, Breccia, Carbonatite, Chalk, Chert, Chlorite Schist, Coal, Conglomerate, Diorite, Dolomite, Dolerite, Epidote, Feldspar, Gabbro, Garnet Schist, Garnet Skarn, Glauconite, Gneiss, Gossan, Granite, Graphite Schist, Gypsum, Hornfels, Laterite, Limestone, Marble, Metamorphic Rock with Garnets, Mica, Migmatite, Mine Dump, Norite, Obsidian, Olivine, Oolite, Phyllite, Porphyry, Pumice, Pyrite, Quartzite, Rhyolite, Sandstone, Schist, Scoria, Serpentine, Shale, Shelly Limestone, Slag, Siltstone, Slate, Soapstone, Travertine and Tuff.