The troll belts gave a lot more value to the troll hides, but I still feel like more can be done to add value to troll items. Troll bones specifically have no use at the moment aside from just being a normal bone material. They have a different size and item type, so why not give them some walue?
Troll cloak - Could offer cavein protection like a miner's helm, except it would not lose durability when damaged by a cavein. Additionally, it could cut cavein dmg by a percentage at any cloak q, rather than having its quality affect reduction (like miner's helm). Base stats would give STR and maybe CON or psy
Troll bone broach - A gilding which woould give str and psy, leaning more heavily on the psy.
Troll club - would cost a troll bone, steel and hard leather. A weapon which has less armor penetration than the slashing weapons but would deal more durability damage to peoples' armor when landing hits. Would also allow for a new combat move called clobber or club, or whatever. Red and green opening
Also at the very least a troll bone should probably count as 2 bones when crafting things.