Red Oilspot Sourced from https://glazy.org/recipes/36081 A cone 6 oil spot with red and black mottling The inside is straight red oilspot.  The running blue-to white comes from layering a band of Spectrum Running Hot Chowder over it.  It sure is running, but that's probably my favorite combo!   Recipe Material Amount Minspar 200 25.91 Custer Feldspar 21.59 EP Kaolin 15.11 Ferro Frit 3195 13.82 Red Iron Oxide 6.91 Dolomite 6.04 Amtalc-C98 Talc 6.04 Silica 4.58 Total 100.00