Look at what we have here, an very large Art Nouveau agate ring that is simply set in a full bezel. The shoulders have a lovely scroll design as it meets the head. The agate has creamy neutral colors with swirls of orange and browns. 
 
The size of this ring lends itself to a mid finger ring as the agate passes the knuckle. 
 
Dendritic Agate
Cut: large oval cabochon
Weight:  21.43 cts estimated weight
Measurements: 32 x 12 x 7.8 mm
 
Dimensions:  34 x 14 mm / 7.9 mm high off the finger / 8.5-2 mm wide
Finger Size: 5.5 (inquire about sizing options)
Metal: 10k yellow gold band and 10k rose gold bezel
Markings: 10K
Weight: 6.3 grams
Circa: 1915
Condition Rating: 8 (ring has been cleaned and stone has been checked, bezel is not smooth around the agate)