Smooth round neodymoum glass beads, otherwise known as alexandrite glass. They change color from pink to purple to blue depending on if you are in sunlight, incandescent, or fluorescent light, respectively. Available in 4mm, 6mm, and 8mm. Made in Czech Republic. You will receive 10 beads. I also have neodymium glass jewelry pieces available. I specialize in rare vintage glass and jewelry, specifically UV reactive glass. Check out my shop for more!