Labradorite Faceted Microbead NecklaceAt rest it appears grey smoke; tilt it and blue fire runs through every bead. Each bead in this necklace is faceted labradoriteplagioclase feldspar whose labradorescent optical effect is maximized by faceting, which multiplies the angles at which the stone can be held relative to a light source. The interference colors produced by the twinned internal layers range from cobalt and teal to gold and violet, depending on the specific bead and the angle of