| Luster, iridescence, and surface blemishes determine price, but so does size, color, shape, and unique matches of two or more pearls. |
| Rich copper-red color intermingles with yellow-olive iridescence at the margins. |
| Strontium sulfate is sometimes used to produce iridescence in glass and pottery glazes, and can also be used as a fining agent in crystal glass. |
| Females are drabber, with subtle iridescence on overall grayish-brown bodies, spotted flanks, and a white teardrop surrounding each eye. |
| Rarely chalcopyrite appeared as a thin film on sphalerite crystal faces, giving specimens a slight iridescence. |
| Renaissance artists used paints and glazes that got their appealing color and iridescence from nanoparticles. |
