This stunning marble has been carefully created in the flame, all of the photographs depict the same marble and you receive the exact marble in the listing.  This marble is made from borosilicate glass and has a small synthetic opal inclusion that looks like a small meteor. 
This marble measures approx:  27mm 
These marbles are the perfect combination of science and wonder for me, the glass, rich in metals creates different effects depending on flame chemistry, temperature and application.  The wonder comes from creating perfect spheres you could loose yourself in, connect yourself to the depth of space and remind yourself of your place in the cosmos.