10mm Bead Stretch Bracelet Featuring Red Agate, Shiny Black Onyx and Magnetic Hematite Click here to shop the entire collection with 5 options. Wear this stylish stretch bracelet with any style. The bracelet has 5 Red Agate stones, paired with 10 Onyx stones and 5 magnetic Hematite stones, for a total of 20 stones. The bracelet has a wearable length of 8.5 inches with an inner circumference of 7.5 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.