Chinese Paint Brush Jasper is like a lot of other picture Jaspers. It is petrified mud or silts from ancient lakes and river beds. Colors come from other minerals such as iron which yields reds, yellows, oranges and such or manganese that can produce grays, blacks and dendrites. There may also be other minerals & colors in the mix as well. This Jasper is found in Southern China and has a hardness of 6.5 to 7. This jasper has also been called Chinese Painting Stone and just Chinese picture jasper.