Black Opal, dark as night, and then the colors wake up. Blue, purple, a flash of red, a touch of green, every bead catches the light differently. No two beads are the same, that is how you know it grew in the earth, not in a lab. Small abacus beads, light on the wrist, easy to wear every day. Pick the size you like. 4.7mm / 3.7mm. Wrist size: 7 inches.