Zebra rock is popular in terrariums because it’s both safe and visually dramatic. The striped black, gray, tan, or cream patterns create a natural “mini mountain” look that makes terrariums feel more like real landscapes. Zebra rock is usually non-reactive, so it doesn’t significantly change soil or water chemistry, making it safe for plants, moss, springtails, isopods and all your little friends. Pricing varies depending on lbs purchased.