What is Volkanix Vita Lava Rock? Lava rock is a form of igneous rock called Scoria that is created by the eruption of volcanoes. Scoria is formed when the molten lava solidifies, in that process air is trapped creating the porous, brownish red lava rock. The Volkanix Vita range is produced specifically for the Reptile market to ensure the best possible quality for your enclosure, Vivarium, Aquarium or Terrarium. Why use Volkanix Vita Lava Rock? Placing Lava rock directly under the basking light gives your Reptile a platform to warm up on, it holds the heat after lights out and is a natural way for your reptile to thermoregulate. It is highly porous which means it can retain, as well as transfer, water to any plants and mosses that have rooted into it.