Green chalcedony and sparkling crystal ring, cluster ring set in 18kt gold,

A gorgeous sparkling ring set with a pear shaped green chalcedony ring surrounded with bright cubic zirconia set in 18kt gold. 

Measurements and markings: 
The cluster setting has a width of 12mm x 14mm, the band at the back a width of 2.5mm. There are a couple of illegible hallmarks and two for 750 :  18kt gold.  A ring most likely from the 80's/90's. The green gemstone is 9mm x 5mm, the eight surrounding stones, 3mm. Ring is size 6.5

Condition: 
The ring is in very good condition. 

Additional Information: 
Included is a short documnet with the ring and each piece is presented in a velvet ring box, tied with a ribbon.