This a beautiful large natural Blue Zircon.
These stones display brilliant fire like a Diamond.
Hardness is Mohs 8.
The 6 mm by 8 mm stone (approx) is eye clean and bezel set in 14k rose Gold on heavy tapered band with raised center.
I can make this ring for you in any size between 6 and 9.
The pictured ring is size 8 1/2 and ready to ship.
Specify your size in a "note to seller" at check-out.