These special teardrops have been coated with dichroic. Each bead must be individually strung after it is blown and placed into the dichroic vacuum chamber. The process gives each bead a metallic effervescent shimmer! Its shape is designed to resemble a drop, with a thin top for the stringing hole and a wider rounded bottom. Handmade Lampworked Boro (Borosilicate) Glass Drops. 1.3 cm X 1.1 cm with 2 mm hole.