Italian 925o silver with 18k gold plate chains are available for an additional $60.
Available in the following lengths:
16″ #PGGC816
18″ #PGGC818
20″ #PGGC820
24″ #PGGC824
NOTE: Solid 18k gold chains of this size would cost upwards of $1,400. The gold plate are very good quality, you just need to be sure not to wear it in a chlorinated pool or it could cause damage.