I recently learned that you can tell the difference between modern tusk and extinct animal tusk by the angle of the W pattern striations called Schreger lines. Tusks from extinct species have acute angles while modern species have obtuse angles. You can see these lines clearly in my handle, especially the blue areas.
Just wanted to learn:
for those horn (stag horn) scale, why some colors are white and more brown/amber, but some others are white and more dark (black)?
What causes this variations? the clean level? the age? or?
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