1980s Nancy & Rise Vintage Necklace

Unfortunately I can not find matching earrings I have had this since I was a teenager they do come in sets I also have white stone one with matching earrings in gold will be listing separately..Clasp is marked but I can not make out It does not react to magnet and has kept its silver color this many years..Real tigers eye stone Hallmarked NR on backside stands for Nancy & Rise...Does have its original extender..Please make reasonable offers..Hit like to receive updates and special offers.