I’ve recently bought a natural-colored green rough diamond which is about 1ct; I tried to send it to a company to polish it but all the companies that I contacted refuse to accept it, a friend says It won’t be green after polishing as the green skin is too thin.
Do you know any company or person who accepts to polish it?
How can I know if it will produce a green facet or not?
Also the rough has yellow-green fluorescence with medium intensity in the middle of the stone and faint at the outer shell (fluorescence zonation)
any comment on the fluorescence?
Can’t say for sure if it would still be green, but I don’t see why not. Your pal doesn’t know much about rocks does he? I cut stones by hand and that does not mean without a jig- it means without a machine. I use a simple Diamond plate and work them by hand. I’m doing that I can cut really small stone without breaking them and get a good polish without over cabbing. I’d try to hand cut them.
The vast majority of green diamond rough has the color confined to a very thin layer at the surface resulting in a colorless diamond after cutting. Fluorescence in the body of the rough is meaningless. See: https://www.gia.edu/doc/GG-SP18-Breeding.pdf