Hi all, so I was roughing the shape for a handle today and noticed some color difference while I was grinding away. Pretty sure its not a burn because I was keeping the temp low. The part of the handle in the image that's darker is near where the end grain edge of the block was.
Any insight on what this discoloration is from? The wood is cocobolo if that helps. Also any recommendations on how I should finish the handle with the discoloration?

Any insight on what this discoloration is from? The wood is cocobolo if that helps. Also any recommendations on how I should finish the handle with the discoloration?