Fabulous Antique Art Glass Sewing Darning Egg

This piece appears to be unmarked so unsure of maker, possibly Tiffany, Steuben, or a Bohemian turn of the century glassmaker.  It measures approximately 5 and 1/4 inches long.  Just a gorgeous piece and even the photos do not do it justice.  I don't think think I would want to actually use it to darn stockings with!