Sterling Silver Dendrite Opal Ring. Oval cabochon cut polished stone bezel set in sterling silver, (stamped 925), with a sterling silver band. Size 6 SIZING AVAILABLE FOR THIS RING, PLEASE INQUIRE PRIOR TO PURCHASE. Dendrite Opals are silicates mined exclusively from New Mexico. Heavy metal deposits in the earth create dark fern like inclusions in the milky white opalescence of the stones creating a one of a kind specimen for each cut of stone. Metaphysicially Dendrite Opals are known to inspire deep intuition for the wearer, encourage self growth and attract magic and love.