It looks like a piece of Obsidian from lava flows, but it's the Ruffwear Gnawt-a-Rock Rubber Dog Toy! This durable throw toy is inspired by natural volcanic glass formed by rapidly cooling lava from Pacific Northwest volcanoes. Unlike Obsidian, the Gnawt-a-Rock is made with natural latex rubber, with a faceted, gum-massaging surface. Its irregular shape creates an erratic bounce, and it has a treat-dispensing design for interactive play and reward.

Please note: If any part of this toy becomes loose or detached, immediately take the toy away from the dog and discard the toy.