Please help me identify these pearls. They’re vintage, likely from anywhere between 1950-1970. Belonged to my great-aunt. The clasp is stamped STERLING. They’re about 8-9mm in size. Feels nice and cold in my hand. Super shiny. Looks like an iridescent cream color but I feel like I’m seeing a very slight pinkish hue as well. Some look very round and some look baroque. The strand was broken by my cousin when she yanked it out of the jewelry box my aunt had it in. It’s definitely gritty but the grittiness somewhat feels smooth, if that makes any sense. Please can anyone identify these?