Tang San naturally didn't know that Xiaowu was wildly guessing because of his cryptic actions. He treasured the head-sized crystal, taking it out from the Moonlit Twenty-Four Bridges, and placed it on the bed. He gently caressed the uneven surface of the crystal as if it were his most cherished treasure.
Xiaowu knew that Tang San was not an impulsive person. Since he valued this crystal so much, there must be some secret within it. She squatted next to him, waiting for his explanation.
"In the realm of crystals, it's not always amethyst that is the most precious," Tang San spoke after a while.
Xiaowu asked curiously, "Then what kind of crystal is precious?"
Tang San said solemnly, "It's hair-crystal."
"Hair-crystal? What is that?" Xiaowu looked at him in surprise, having never even heard the term before.
It was no wonder Xiaowu didn't know; the concept didn't originate from this world but was something Tang San had brought with him from the Tang Sect.