Chapter 343 Stone

Near Dongting Lake Junshan, there is a cave. The cave is spacious, and the lake is in and out of it, which is unfathomable. The mountain walls on both sides of the cave are covered with black stone, and the color is like lacquer; the black stone is soft, cut with a knife, and falls casually. It can be used to make an inkstone, pinch the shape in the hole, take it out of the hole, and see the wind hardening. This kind of inkstone is satisfactory and of good quality.