A vintage 18 carat white and yellow gold ring set with a cabochon opal in a diamond cluster. The half cut diamonds are .07 of a carat in total, the opal has a diameter of 6 mm. 

The ring is hallmarked for the City of Birmingham and the year 1972. 

The ring size is 16.75 mm, the size can be modified if necessary. 

Nicely made with the rough nugget style band, the ring is in good condition.