Green "opal" gemstone beads have rich earth tones, a polished luster and smooth surface. A type of chalcedony, natural green "opal" has a hardness that works for long-wearing designs. Machine-cut for a consistent size and shape.
Beads>Grade B>Other Opal VarietiesBeadsGrade BOther Opal VarietiesGreensOval14mmNaturalhttp://www.firemountaingems.com/itemdetails/h209558gsH209558GSBead, green "opal" (natural), 14x10mm flat oval, B grade, Mohs hardness 4-1/2 to 6. Sold per 16-inch strand.//image1.fmgstatic.com/images/p9558gsb.jpg18.7718.77As Low As $9.62 per strand