This stone is commonly found in white and black. It's color black might possess different shades, from bluish black to dark gray color. The composition of the dendritic opal includes the black minerals that are known as manganese, with the dendrites taking a unique leaf-life shape, which resembles that of a fern.
The dendritic opal is greatly rare as it is produced and excavated just in New Mexico. It is also where there’s just one mine for the stone.