From time to time we get access to fossilized bone, horn, antler, teeth and other "parts", that are stabilized and cut for knife handle scales. The list includes wolly mammoth teeth slabs (and we do have a couple of whole wooly mammoth teeth), fossil ivory, fossil tree bark, wooly rhinocerous bone and fossil antler.
Each pair of scales is a separate item ... only one pair of each.
So ... "D" indicates fossil deer horn
"M" indicates fossil wooly mammoth ivory
""Y or W" is fossil wooly rhinoceros bone
"X" is fossil wooly mammoth tooth