The Sphera Green bracelet is made with elegant 2mm round Obsidian stones and finished with a titanium element. This bracelet is refined and classy and matches perfectly with other accessories or watches. Obsidian is a natural volcanic glass formed when lava cools quickly, creating a smooth, dark green surface. Known for its protective qualities, obsidian has been used for centuries by different cultures as a powerful shield against negative energy. It is believed to help clear the mind. Why should you buy one? - 12-month warranty period & free exchange if the size is not right - Your bracelet will be made and shipped within 48h - It is made from top-quality materials and officially 'handmade in Belgium' Not sure about your size? Check out our size chart below ⤵