Silver plated cuff bracelet adorned with colbalt beach glass found in the St. Lawrence River. This cuff is adjustable, light weight and beautiful to look at.  What was it? Finding colbalt beach glass is like finding the Golden Egg for me (1 in 250 pieces found may be Colbalt Blue). What was it? Colbalt glass was used for Noxzema jars, Vick's Vapor Rub, Milk of Magnesia, Bromo Seltzer, medicine and poison bottles, glass eye wash cups, ink and perfume bottles.