Obsidian can be an earth-stone, activating the root chakra and grounding you as part of your connection for the Earth. It clears the aura of detrimental Power, and can be useful for scrying. Tiger Iron is mixture of Tiger Eye, Crimson Jasper, and Hematite, making it a powerful grounding stone. https://gemstone-beads-bracelet96296.pointblog.net/gemstones-jewelry-fundamentals-explained-72497150