Dendritic Black Opal 6mm Round 15-16 Inch Cacao strong tropical wood native to

strong tropical wood native to the Philippines

The inclusions are of manganese or iron

Petrified Wood Agate is formed from the petrifaction process of primeval trees over the course of many years

second only to Diamond

near the Kennedy Ranges of Australia

Dendritic Black Opal 6mm Round 15-16 Inch Cacao strong tropical wood native toThis 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.