Mammoth ivory and molar pen blanks. Individually cast for easier drilling.
These are standard length pen blanks. Arranged as 2x2 pieces.
 
Working With Mammoth Ivory and Molar:
These fossils are not yet petrified, though you may see limited mineralization. The tusks are still soft enough to work with regular tools you would use for horn and bone. Just keep them sharp.
Molars are hard as a rock and have a laminated structure. For experienced turners only.