Hsieh points out that the molecular structure of bismuth crystals shows 18 refracting facets, and that if successfully fired, bismuth oxide becomes iridescent--it refracts light falling on the glaze from pretty much any angle, radiating multicolored hues like a rainbow.
謝嘉亨強調，「鉍」的分子晶體多達 18 個折射面，燒製成功的氧化鉍，幾乎可折射任何光線，並呈現類似彩虹的斑斕色澤。