Kaelen didn't stay at Cassian's house for too long; he hurriedly hugged the freshly made stone mill and returned to his home. He really wanted to test if it could grind heat-shocked quartz. Although the cave was very well-ventilated, quartz dust could damage the lungs, so Kaelen decided to test it on the grass outside the cave entrance.
He first brought out a basin of water and a wooden dipper, followed by a wooden basin that perfectly fit the stone mill, and finally the bundle of quartz shattered using the heat-shock method. Shattering quartz using this method wasn't too difficult; one only needed to bury the quartz in red-hot charcoal, roast it for as long as possible, then use wooden tongs to pull it out and immediately throw it into a basin of cold water. Doing this would make the quartz more brittle, easily crushed with a stone pestle.
