This incredible marble has a beautiful synthetic opal inclusion that looks like a meteor rocketing through space. 
Each of my marbles are made using strong borosilicate glass, they are carefully made in my studio in the west of Scotland, they are kiln annealed for strength and durability.  These are NOT toys and must not be treated as such, they are not designed for Children, care must be taken when displaying them so that they do not amplify sunlight. 
 
Measuring approx:32mm