I forgot who asked, but here the Sohngen Stony Yellow cone 10: 1675 Kona F4 Soda Spar 1250 Kaolin 850 Dolomite 525 Talc 350 Spodumene 225 Whiting 100 Bentonite 95 Red Iron Oxide *For blue, lower Red Iron to 45 and add 45 cobalt carb Regards, June