Size 8 Tiffany & Co. 9 Carat Emerald Cut Prasiolite

Authentic Tiffany Green Amethyst Cocktail Ring 9 Carat Emerald Cut Prasiolite; Clearly has some scratches and a small chip which you can see in pics, you can not tell when wearing unless you are looking closely; I got one quote on polishing to get scratches out etc and it was $300, the quote to change the size was $50. I paid just over $1k originally; I have original box/es, bag and receipt. I considered turning it into a smaller ring with matching earrings but never did.