Running Bear Native American Copper and Sterling Silver with Black Onyx Necklace

Part of a family estate: Running Bear Native American Copper and Sterling Silver with Black Onyx Necklace This is a Running Bear Native American Necklace marked / Stamped with Hallmark of Bear( As Shown) and R.B. (Running Bear) CU. and is Sterling Silver and copper and black onyx beads. As well as green and purple long beads hidden then exposed thru the copper openings.(as shown).It has hook, clasp sterling silver end’s and tooled copper mixed with Black Onyx and Green and Purple which as described as visible only thru openings. This Wonderful workmanship with it’s attention to every detail. Just show’s what went into this great design and to pull it off! The sterling ends are marked (Sterling) Also it has a hang tag (as shown reads) R.B. CU Sterling. Measures Approximately:27 "inches long Approx. 72 Grams. In original Chaco Canyon box with velvet bag. It appears to be unworn but I cannot guarantee it.