100% natural dendritic opal cut into these stunning faceted discs measuring 6.5mm. Dendritic Opal is a form of common Opal that has dark dendritic, tubular or orbicular markings within the base Opal, which can be composed of Manganese, the dendrites (plumes) often appear to be shaped like mosses, ferns or trees Hand shaped and culled for the best quality! Dendritic Opal is sometimes referred to by the metaphysical name of Merlinite, a crystal which is very similar in chemical composition and appearance. 8" strand, temporarily strung.