Beautiful Drop like structure made by only stone

Here I present,
A beautiful stone sculpture made by Hirotoshi Ito, a popular artist make design on stone.
In this design, the stone is cutted perfect leaving a circle in the middle is the most difficult task and to join it with a thin small pillar connect stone and waterdrop like small circle.

Artist Hirotoshi Ito have done a great job making it looks like drop of chocolate drop on the stone fills with chocolate cream :)