Question about black mandau

[Godfried]

Underneath a mandau of which the blade is black. It doesn't seem like a pamor to me because the drawing of pamor is created by forging different types of steel together. I don't see any of that. nr-1 is the mandau, nr-2 and-3 are details so that the iron can be seen better and nr-3 is the "white" sample of a Jimpul to see the color differences well. Meteorite steel is found by dayaks in riverbanks and beds and is black. Does anyone have another explanation or is this indeed meteorite steel? At the time I bought this mandau with the mention "pamor".