Vintage Royal Chain Group RCI 10kt Open heart clear rhinestone pendant necklace

Vintage Royal Chain Group 10kt open heart glass rhinestone pendant necklace Signed S on back of open heart that has open back construction. Signed RCI (aka Royal Chain Group) 10Kt on plate attached to spring ring closure. Spring ring has a stamp that looks like 417 Necklace and pendant are silver in color is 10kt gold. Tested positive for 10k with 10k acid solution. Delicate mini herringbone chain measures approximately 18”L Weight 1.86g * Royal Chain Group is a family-owned and operated gold jewelry supplier in New York City that was founded in 1978. They are a certified member of the Responsible Jewellery Council.