Can somebody help identify these pearls and help me with an estimate of what they are worth? They are gritty, 6 mm, round with a light pink hue. The clasp says silver on it and it's adorned with a small pearl. I had them handed down to me from my husbands grandmother after she passed. I have no information on them other than that they are real. Thank you. There are no visible flaws and they are tied together between knots