The granules of sand and grit were different. The former was finer and softer, while the latter was fuller, harder, and discernibly grainier.
The abnormality had eroded Kumtag Desert, turning a third of it into black grit. It just so happened that the yellow and black was separated by an oasis narrowly escaping the disaster. It would be a strategic point in the days to come.
Speaking of the black grit, it was hollow inside and had a smooth, round outer shell. It could withstand a considerable pressure and was highly conductive.
Xiaozhai knew what Gu Yu expected out of the grit, thus she refined a small amount to begin with and put it in her small gourd.
When purely used as a container, the gourd was small enough to hang around the waist. The bigger ones could only be refined into magical instruments so as to be stored away in one's mental space.
