back in 2016- 2017 i had a fine jewelry business where i designed and made a full collection of rings, necklaces and bracelets from 18k yellow gold. these beaded necklaces were part of a collection that i never launched and just stumbled upon while looking for some vintage goods in my storage - hurray! each piece is hand knotted using real natural stones accented with solid 18k gold beads. no two are alike. layer with your gold stacks as you please. this measures 30" in length. approx 2mm sized beads. tbh i'm not sure if this is black opal or black onyx...i've been out of the biz for eight years and am a little rusty. forgive me.