These small have water trapped inside!
Acquired recently from a collector they are very special.
This happens when the floats, attached to fishing nets, are dragged deep under the sea. The water pressure allows water to seep into tiny cracks in the glass that seal over again once the floats are returned to the surface.
Only 2 left available, this listing is for one only.
Price is for 1.
Measures approx: 6cm diameter