New 18 karat gold plated necklace with sparkly deep blue sapphire-like crystal

18K white gold plated necklace. With the oval halo style pendant: a deep blue sapphire-like crystal surrounded by clear faceted stones. In brand new condition. Was taken out of the sealed package only once, to take pictures. A woven sparkly chain is 18" long plus 2.25" extension. The pendant is 0.75" long (with bail). The stones are likely lab created.