✨️Very rare Corundum in a mystical color 835⁰

Collection-worthy Teal Green Corundum massive - in luxurious execution - 835⁰ silver proof
I have never seen corundum in such a color
Possible age of the ring is about 80 years
The ring is impressively large.
Corundum is about 18 carats
The ring is old, so there are very tiny-insignificant signs of use on the corundum (visible in pictures), no noticeable scratches! Possible to polish!
Ring size 17.2
The price reflects the rarity of the ring, the rare color of the corundum, and its size.