With regard to shape, some theory insists that a mark with two peaks, as shown in the figure, is called ioriten and a mark with one peak which looks like a hiragana character 'へ' (he) is called gatten.
形態については、図のように山が二つあるものを庵点、山が一つの「へ」のような形のものを合点（がってん）と呼ぶという説もある。