Spalted maple guitar top type 'B' ripple figure.
For drop tops.
Acer Macrophyllum sourced from USA.
Photo is of actual piece.
Spalting happens when logs are left lying in the forest for a while and start to rot. The action of the fungi can create wonderful and unique patterns in some types of wood notably American maple and European beech. There is a sweet spot in the process where the markings are well developed but the integrity of the wood is still ok.
Spalted timbers are always somewhat softer than the timbers they originate from and this needs to be accommodated when working with them.