The black stone was a Spirit Stone.
A Spirit Stone!
Spirit Stones were the most basic and most important resources for the cultivation community. The pure Spirit Qi stored inside could be absorbed by beginners and used to increase their power. They were essential for cultivation, array formation, pills refinement, artifact crafting and building.
Chen Fan thought the Spirit Qi on Earth didn't favor the formation of Spirit Stones at all and only normal jades existed, and yet a Spirit Stone was right there.
"…Yingzhou Island, a hundred miles… Ganoderma Spirit Herbs and jades…"
The passage on the stele came to Chen Fan's mind again.
Chen Fan had seen the Ganoderma Spirit Herbs and had wondered where the jades were. He then realized that those weren't jades, but Spirit Stones!
"The Spirit Qi in a Spirit Stone is ten times more than a supreme-grade jade and it's really useful for my cultivation. If I can locate the Spirit Stone Mine…"