Vaughn Evans

Hi my name is Vaughn Evans, I am a professional marble maker, and am attempting to get all the info I can on sphere denominations and sizes. I want to attemp to reproduce one of them as accurately as possible. I have found the wiki pages that state that they are the size of a fingernail, and flat on one side. I need help choosing which stone to emulate. The stones I will be encasing are Gilson syntheitc opals like any of these - https://www.google.com/search?q=Gilson+synthetic+opals&source=lnms&tbm=isch&sa=X&ved=0CAgQ_AUoAmoVChMIw6KCh_PLxwIVA9WACh3O8wqj&biw=1280&bih=583 If one of these looks good for a certain denomination, I would encase it in glass, and take plenty of good pics for the art of it. Let me know if you can help in any way, information wise. Thanks!!! -Vaughn at CremationMarbles.com