... holes 2) Customized sizes accepted. Large Hole Basalt ,Lava Basalt, Lava Stone, Grey basalt, Volcanic stone,Size 30x30, 30x60, 40x60, 60x60, 120x60cm,etc Surface ... treated surfaces, such as honed, polished, bush hammered, etc., with all kinds of shapes and thickness. Volcanic Lava Stone,Lava Basalt,Large Hole Basalt