Wezi

In Kiraharr, Traverse End, and the south of the Bog Barrens you’ll find slightly iridescent glass disks about the size of marbles and almost impossible to break, used as currency primarily by the tabaxi. They are naturally created, as the tabaxi explain, by hyper-concentrated beams of moonlight that can spontaneously generate in the Kiraharri nights, focusing on a point in the sand that liquifies, and then hardens, into the small glass disks.