Try to seperate them with the edge of a credit card.
If possible seperate the zoos from the pebbles and leave the mushroom attached to the rubble.
You can use superglue gel directly on the zoos to remount them, but you can't use it on the shroom. If it is attached to the rubble, then you can superglue the rubble to a rock to remount the shroom.
Just be careful, take your time, and wear gloves.