Mahogany obsidian beads in various sizes for making jewelry. Each strand measures between 38 cm to 40 cm in length and features threaded, drilled mahogany obsidian beads. The mahogany obsidian beads are available in various size options and are ideal for making jewelry, accessories, and other creations. Mahogany obsidian exhibits its reddish-brown coloration due to the presence of iron in its composition.