I’d love to know what necklace she is wearing as well. Thank.

Did anyone ever find out where this necklace is from?

You can’t, that necklace isn’t a fashion piece or regular piece of jewelry. It’s a Mangalsutra, or as South Indians Tamils call it, Thaali, only married women wear this, widows are normally expected to remove all their jewelry and not wear any bright clothes or makeup, especially their Thaali after their husband dies.