Obsidian Obelisks streaked with different colors. This streaking you see is a representation of a distinct pulse in the eruption of the volcano it came from. If your lucky you might get some with Silver Obsidian! Obsidian is a natural glass that was once molten magma making this a powerful piece to work with. It may assist you with staying grounded, assist unbalanced energy, stimulate your intuition, divination, and to keep your energy clean and protected.