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The thing that's extra interesting to me about that cross-section is that the pattern is pretty clearly a two-point sourced wave propagation interference pattern.

Well, I'm not willing to say...

I wonder if this is a difference from where along the shaft the cross-section is taken, or if it's just the individual variation?

Wow, the patterning in that first picture, Neil.

Just... wow.



Interesting! So the striations are strongest near the enamel layer.

http://theshiveringbeggar.com/wp-content/uploads/2013/03/IMG_8344.jpg

I thought it might be useful to gather up most of my ivory hafted gear and get a picture or six. As I was carrying all these...