Bone is common Miscellaneous item found throughout the game, primarily of use for bartering, or sale to Traders.
This bone - part of a leg, or perhaps an arm - is clean of blood and sinew.
Properties
Miscellaneous Items
Rarity: Common
Weight: 0.1 kg / 0.2 lb
Price: 1 gp 
UID
LOOT_GEN_DryBone_A
Where to find
Found throughout the game as set-dressing and random loot.
Notes
A much rarer uncommon variant of this item also exists: Bone (Uncommon).