Hey VANDOO...
I'll buy that it is Stegolophodon (a Mammoth ancestor). I know it is not Mastodon.
Sometimes they use "dyes" (colorations) on these fossils, to make them more colorful and attractive. They can be kind of pale in color if left natural. The natural teeth do not have this kind of color anyway.
I have one that is not dyed. But it is still pretty.