Beverly K markings? I bought a ring at a pawn shop....

[teddybearmommy]

and I think it might be a Beverly k... It is marked as 18k gold .91 (I think that is the diamond weight) and has a capital B . It is an identical match for this ring of Beverly K's just wondering if there is any way to authentic it? If there is any reason to? By the way I paid $300 for it
http://www.pearlmansjewelers.com/jewelry-designers/beverley-k-jewelry/rings/55PP1/