Gorgeous Boulder Cloud in colored glass

Description

This boulder is out of round and I believe has been polished but a bottom pontil remains.  Some evidence of damage still remains mostly in the area of the pontil.  It measure 2.36 inches across and 2.24 inches high.  The glass is blue. One picture shows some green glass - there is no green glass. The core is mostly transparent but white and blue stretches from top to bottom.  There are also a few streaks of red on the core.  The top of the core has a "fairy ring" of tiny clear bubbles around it.
If anyone has ever seen a marble like this please let me know.  It belongs on the top shelf of any collection.
On Jul-10-21 at 12:52:43 PDT, seller added the following information:
this is a German handmade marble that has been polished.... a beauty