18k Gold David Yurman Onyx And Diamond Pendant Necklace Featuring Square Cut Onyx Pendant With Diamond Halo, On Modified Curb Chain Necklace, Marked "750 D.y" Chain Length: 18 In.  Pendant With Bale: 1.5 In.  Provenance: Property From The Collection Of An Alamo Heights, Texas Estate *all Diamond Or Stone Details Including But Not Limited To Color, Clarity, Cuts, And Carat Weights Are Approximations. Unless Otherwise Specified, The Descriptions Provided Should Not Be Regarded As A Substitute For A Gem Report From An Industry Professional. They Are Provided Solely As Helpful Guides To Assist You In Your Decision To Purchase.