Dendritic Black Opal 6mm Round 15-16 Inch Size_2mm It has been greatly sought

It has been greatly sought after throughout history and was at times valued as highly as Diamond

features intricate light brown patterns on dark brown stones

These inclusions create black and brown spots that resemble the random patterns found on its namesake

Black Spinel not only has the dark color

Robles is a light

Dendritic Black Opal 6mm Round 15-16 Inch Size_2mm It has been greatly soughtThis variety of opal is named "dendritic" for the small inclusions within it that resemble moss or ferns. These inclusions consist of iron, manganese and other metallic oxides captured during the forming of the rock. Opals are hydrated amorphous forms of silica, created when silica hardens within the fissures of other stones.