“You can identify the Purple Veined Heaven Crystal?” Xiao Tiannan said with his brows knitted as his heart trembled; because the purity grade of the Purple Veined Heaven Crystal that this “genius doctor” had uttered, was actually not off in the slightest! This piece of Purple Veined Heaven Crystal had always been the most valuable treasure of his sect, and was always hidden in the most covert of places; only a few people in the sect had ever seen it. Word of its purity, was even more so, impossible to have been leaked out.