Polished Red Agate and Matte Onyx 10mm Natural Stone Bead Stretch Bracelet Add this stylish natural stone stretch bracelet to your choice of daily wear. The bracelet has a total of 20 polished Red Agate stones with 1 matte Onyx stone, for a total count of 21 stones in a 10mm width. The bracelet has a wearable length of 8.25 inches with an inner circumference of 7.25 inches. The stones have a width of 10mm or 3/8 inches. Red Agate is said to help block negative energies and enhances positive ones to feel courageous and confident.