Rhino Stone Aquarium RockRhino Stone (also referred to as Lichen based Rock) is a blackish, premium quality stone that features a neutral grey tone with cream to brown hues mixed in. With its neutral colour, this stone will work perfectly with a wide range of aquatic plants, allowing you to create a stunning underwater landscape that truly captures the essence of nature. Its natural texture and shape make it the perfect choice for creating a variety of different aquascaping