Fake Spirit Stones only had the appearance of a Spirit Stone.

Real Spirit Stones contained an enormous amount of spiritual energy that could speed up one's training immensely upon absorption.

Fake Spirit Stones, on the other hand, had very little spiritual energy. They were semi-finished Spirit Stones and needed a very long time before they could develop into real Spirit Stones. Chu Xun could not afford to wait that long.

While fake Spirit Stones were ...