8mm Hematite Cube and Amethyst Beads Stretch Bracelet Click here to shop the entire collection with 5 options. Wear this stylish natural stone stretch bracelet with any look. The bracelet has 1 Hematite cube bead paired with round stone beads. The bracelet has a wearable length of 8 inches with an inner circumference of 7 inches. The stones have a width of 8mm or 5/16 inches. Amethyst is said to provide protection from negative energies and bringing positive ones.