Novice Brewer (2)

Ashton could see most of the class make weird expressions upon hearing what Kakaroff had to say. The threat of punishment was making them work even harder. But simple hard work was not going to make any difference in potion-making. Suddenly Anna's hand shot up in the air. She had finished making her potion. 

"Finally someone did something." Kakaroff sighed and rushed over to her table, "Step aside! How am I supposed to take a look if you keep hovering over me?"

He then proceeded to drop an azure gemstone inside Anna's pot. There was a string attached to the stone using which Kakaroff pulled the stone back. The gemstone had only been inside Anna's pot for a second and yet its colour had changed from blue to green and parts of it appeared to have decayed.