Hi Jens! My own name is Sergey
and I know that it is even funnier for English-speaking people. I took the Ren Ren nickname many years ago at the Sinologists forum, where I was led by interest in Chinese weapons. In Chinese 刃人 means Blademan.
I do not insist that it is certainly a camel bone. To confirm this, I need to see the object with my own eyes. But looking at the photo it seemed to me that a dense grid of small parallel cracks is present. And I wanted to draw attention to this. First of all, the attention of the owner of this nice khyber knife.