Antique 18kt gold gypsy ring set with a single cut diamond.

Antique gypsy ring set with mine and old cut diamonds. The central diamond set in a diamond shape and on each side of this two diamonds are patterned shoulders 
 
Hallmarked Birmingham, 18kt gold, date letter 1915
The ring is a size 6.5( M-N)
Weight is 3.29 grams. 
Single cut diamond 2.5mm. 
The ring is in good condition.  
Rings are shipped in velvet ring boxes, with documentation.