Tundra Grey Limestone. The elegant soft tones of this natural stone make it ideal for giving a delicate, yet high-end feel to any application. The ability of this beautiful stone to match with most materials and finishes makes it a perfect long-term décor choice. Tundra Grey is quarried in Turkey and is a densely patterned limestone of light grey and whites. It is available in both tile and slab formats, making it suitable for myriad design applications.