Vintage Minimal 925 Sterling SILVER Blue Topaz Necklace

Pretty blue topaz marquise cut surrounded by an intricate silver design and small CZ diamond rhinestones. Stamped 925 and what looks like ND and LT inside the pendant bail. ND is a vintage jewelry maker from 1980s. Approx chain length 18.5" Light wear and tarnishing/patina present. Has rust color on it. Has been lightly polished. art nouveau elegant wedding fancy formal minimalist chic simple delicate dainty clean lines understated elegance refined basic practical versatile embellished M