Click space to see the next slide. When it shows the word "Noice," in which I misspelled intentionally, don't click space unless you'd like to restart.
Shading, reflectivity... There's 2 things missing. Vibrancy and joint lines... That would make it look more like a glass circle, or sphere, in that insistence. But I'm sure there are scratchers out there that can draw a glass ball (or sphere) better than the one I have shown here.