Cerim's interpretation of Onyx is striking. The fully polished version is dramatic without being extreme, and the coordinating natural finish is more subdued. The 12x24 comes in the standard 10 mm thickness in both finishes, while the 32x32 (Polished only) is 6 mm thick, making this large format easier to install on walls. Natural Finish is suitable for walls and residential and light to moderate commercial floors. See below for special notes about Lucido finish and 6mm thickness.