This is a fine antique miniature Bohemian Kralik glass vase with its original white metal collar. It dates to the early 1900s.
As you can see from my photographs, it is a fine piece of Continental Glass - with a textured exterior - and a fine iridescent lustre finish.
The collar is designed to lift off. The metal collar has no hallmarks. Underneath, the collar the rim of the vase is perfect with no chips.
It is a lovely piece - measuring some 6 inches in height.
It was attributed to Carl Stolzle, who specialized in these types of green glass Art Nouveau pieces - with decorative metal collars.