Marquis Cut Dendritic Opal Ring in Sterling Silver. 
Size 8 1/2.
This type of opal features dendrites, which are fern-like inclusions of iron, manganese, or other metallic oxides that create bold patterns within the gem.
      
    Size 8 1/2.
This type of opal features dendrites, which are fern-like inclusions of iron, manganese, or other metallic oxides that create bold patterns within the gem.