Black Onyx is quarried in Turkey with limited production. With its rich dark tones, this unique onyx, is crosscut to show a flowery appearance. Blocks are shipped from Turkey to Italy to be cut and processed using century old techniques. The slabs are hand worked to fix the open voids and cracks. It is a common characteristic for this stone to have voids in the raw material. Before the stone reaches the polishing stages, these voids are filled with broken pieces of onyx and polyester resin. Depending on how deep each void is, the resin may shrink as it dries, which will leave the surface of the filled area slightly lower than the rest. This does not affect the durability, maintenance or beauty of the stone. Due to the qualities of the stone, the slabs are book-matched; meaning slab one and slab two will be cut and polished to create a mirror image of each other. These are then kept in sequence, which allows for a consistent flow in pattern. Finally, a mesh backing is adhered to the back of the stone to ensure safety while handling and fabricating the slab or tile. As a natural stone product, it is recommended that this be sealed to extend its longevity.