The deep red color comes from hematite (Fe2O3) coating the quartz sand grains

A ring for everyday wear—the heart setting makes the stone the focus while the cut does the work

In contemporary stone practice

it carries no play-of-color

Labradorite Faceted Microbead Necklace Cathedral Rock Charged The deep red color comesAt 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