Dendritic Black Opal 4mm Round - 15-16 Inch Featured_03052026 Boulder Opal is a golden-brown

Boulder Opal is a golden-brown to dark brown stone

Rosewood is a hardwood found in the Phillipines

which tends to be a strong blue color

resulting in fossils that are chalk-white

this semi to precious variety of quartz is found in many locations around the world

Dendritic Black Opal 4mm Round - 15-16 Inch Featured_03052026 Boulder Opal is a golden-brownThis 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.