Dumortierite Gemstone Beads from Rings & Things: Named after French paleontologist Eugene Dumortier, the semiprecious gemstone dumortierite is typically colored blue or violet. Beads cut from this borosilicate mineral are also known as blue quartz beads (and are sometimes spelled dumortirite beads). The attractive, bright color and hardness of these semiprecious beads and donut pendants make them a great substitute for pricier gemstones. In fact, dumortierite beads are often is mistaken for lapis lazuli, which can cost up to three times more! Dumortierite beads are thought to enhance organizational abilities and self-discipline. They are also believed to release fear, bring courage into one's life, and boost creativity and expression. Choose from beads and dumortierite donuts for your jewelry applications.