Once placed, the Lodestones could generate an extra bit of Metadata to prevent them from restacking, but allowing them to continue to be monitored either as an item in the world, or as an item in an inventory, this would allow for players to have compasses pointing either at inventories they want to remember, or at other players who are carrying the relevant lodestone, The compass would continue tracking the lodestone until it's destroyed by some means such as the item being blown up, burned or despawning
Once placed, the Lodestones could generate an extra bit of Metadata to prevent them from restacking, but allowing them to continue to be monitored either as an item in the world, or as an item in an inventory, this would allow for players to have compasses pointing either at inventories they want to remember, or at other players who are carrying the relevant lodestone, The compass would continue tracking the lodestone until it's destroyed by some means such as the item being blown up, burned or despawning