Very attractive 18 carat gold Victorian ring set with five cabochon stones -
Lapis
Banded agate
Garnet
Carnelian 
And very dark blue grey stone I think might be a cats eye. 
The stones graduate from the centre as the gold band gently tapers. 
The inside is engraved - ‘25th February  1871’ and as there is no age this may have been an engagement ring.
There are hallmarks for 18 carat and a makers mark S.W. 
A great stacker 
The ring is a size 7 3/4 
Weighs 4.8g
5mm wide at the front 
Good antique condition