I like to use local rocks for mark making, using earthen materials influences the paintings in a lovely way. This is gypsum from Russell County, KS.
https://angelamullerart.com/wp-content/uploads/2017/09/MULLER-ICON.png00AngelaMullerhttps://angelamullerart.com/wp-content/uploads/2017/09/MULLER-ICON.pngAngelaMuller2018-03-26 19:59:072018-03-26 20:01:03Stone Art Tools