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Identify this material

Not a type of figured grain. They’re mineral deposits pulled up through the trunk of the tree. Often lots of silica, usually very hard on cutting edges, but worthwhile if you’re willing to stop and sharpen frequently.
 
Is this a piece of Hard Maple??? I am in Washington state and have never seen this figure in
big leaf..... and any other Maple that I have turned.
Because I have not seen it means nothing .... but i have seen a lot of west coast maple .
 
I have seen this coloring pattern in a number of woods. The only thing they had in common was that they were starting to die. I am guessing mineral deposits of some sort. For sure, they do not follow the growth rings.

robo hippy
 
This figure is quite common in the Maple I've turned up here in Mass. Not sure what to call it, but it sure does make for great looking bowls and turnings. Can't say that I've noticed it being any more or less hard on tools than regular maple, FWIW.
 
This figure is quite common in the Maple I've turned up here in Mass. Not sure what to call it, but it sure does make for great looking bowls and turnings. Can't say that I've noticed it being any more or less hard on tools than regular maple, FWIW.
I run into this allot here in western New York. Never really knew what to call it. I notice no real difference in tool edge when I get into it.
 
I think it is a fungus, just grown like that, sure will look good I think if turned smooth an then finished.

Do these spots get darker or more intense with an oil over/in it ??.

I have turned some Norway Maple but never got this kind of figure, finish it and show us the outcome please !

Here is one I turned where the whole log had this intense dark heart.
Norway Maple bowl from a wole dark heart log.jpg
 
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