Hi, welcome to the Board.
This may, or may not, be a paperweight. It would be helpful if you let us know the size of the item - height with and without the black plinth, and diameter of the base of the rocks section.
The plinth might not have been original to the owl. Is the plinth also glass? There appears to be unnecessary markings on the plinth around the the foot of the owl, suggesting a marriage of two items.