Many people have a specific idea of what art means, from its display to its materials. But the two artists behind these gorgeous stone mosaics have challenged many ideas about both art and design. Naomi Zettl and Andreas Kunert, whose company is Ancient Art of Stone, design and build massive stone art installations that double as walls, murals, fireplaces, and more. The pair is dedicated to making beautiful pieces that are custom to every individual space, and doing so in a sustainable way. Just take a look at some of their work and try not to be amazed.