Lithops, native to Southern Africa, are also known by the name 'Living Stones' because of their resemblance to pebbles and rocks that scattered around their natural surroundings. Lithops are tiny slow-growing plants that grow close to the ground. Each plant has an underground stem with a long root that connects to two above-ground thick leaves that are merged together at the soil level.
Succulents are a group of plants that store water in their leaves. The leaves tend to be thick and fleshy, but some genus and species have thicker leaves than others. Succulents tend to thrive in dry climates and don't like a lot of humidity.