Haven't done one of these in over fifteen years. Found some woolly mammoth ivory I picked up in Alaska years ago and thought I would see if my eye sight was still good enough. Oh how I miss my 20/20s. Sanded the dark surface off to make a window for the art work. The picture is drawn with a pencil then scratched with a sharp awl and the scratches filled with either India ink or acrylic painted.
Mounted it to a piece of soapstone from near Wenatchee, WA