Onyx slabs come in two thicknesses: 20mm and 30mm. onyx kitchen worktops, splashbacks, and upstands should be 20mm thick. The cost of a thicker onyx worktop is more than a 20mm version since it requires additional support.
The edge of the onyx worksurface can be built-up to provide a thicker appearance, avoiding needless pressure on woodwork. Intricate profiles can be found on 20mm onyx worktops and bathroom vanity tops with built-up edges. During the quotation process, please specify the desired edge profile.