Opal is October  Birthstone.

Exact Carat Total Weight:    ( Silver + Stone)   18.35 carat,       3.67 gram  .
 
Shape:   Natural dancing High Quality top flashing Ethiopian black Opal 17.0 mm x 10.5 mm x 5.5 mm = 4.75  carat. 
Color:           Very flashing
Clarity:         Translucent.
Luster:          Beautiful
Treatment:    Unheated.
Origin:           Ethiopian  
Hardness:     6.0.
Ring Size;     8.5
Face Ring :   19.50 mm x 12.2 mm.

Retail  Value:  1950$            

Item is in excellent condition, and it can be great gift to your daughter, yourself  or someone you love and even make your collection