That's AWESOME! I've been looking into some Mammoth tusk, but the stuff is expensive!
It is just Slimline Pro from PSI.That is great work. Might I inquire as to where you got the kit at? The round button (the part touching the pen barrel) caught my eye. I don't think any of the clips I have are styled like that. I like the looks of it though.
Beautiful segmenting, I have a couple of questions though,
What is the black material , and what type glue do you use , Epoxy, or Cyanoacrylate (superglue/CA) the work is very interesting.