I created a horn shape using connected lines which I converted to curves with Xara’s Shape Editor tool. Just make a series of connected lines and then use the Shape Editor tool to drag the segments into curves. In Draw, select all the nodes and in the Node Edit menu make them all To Curves. I applied a marble fill to the horn from Xara’s Fill Gallery-Marble library. I created a duplicate of the horn and filled it black. I created a white highlight shape inside the horn, blended the two shapes, placed the black and white blend over the marble horn, and applied a Linear Transparency-Bleach to give the horn shape.