Copper turned out to be very easy to find. There was plenty of copper, and Rino decided they did not need to find a new copper vein until the copper bank Noir stumbled upon was depleted.
Under the light, it was easy to find copper because of that orangey tinge on the walls.
"Be careful not to mine up clay. Copper has a more solid feel and is less smooth. Sometimes, it will look diseased with bumps on the rocks instead of just a smooth surface. At the same time, copper can sometimes be green. The colours vary. This bit of copper is fresh, so it is still mostly orangey."
Green?
"Why will it sometimes be green?" Rino asked.
Noir shrugged. In all honesty, this was more of Phil's alley than his. Ace was only good at understanding economy and psychology. The god of landscaping would know more, and all the information he now knew was purely through observations.
