Build a Marble Run Game STEM Challenge STEM Club Fun! Marble Stone Marble Slabs Stone Slabs Guangxi White Marble Slab Blue Marble Round Tray beuniqueleb Pure White Marble Tile 10mm Marble Shower Panels Easy Panels. Handcrafted polished grey marble tray. Grey Marble 300mm D Made in India Please note that marble is a natural material that is both porous and brittle. Variance in shape or colour as well as imperfection or small repairs doesn't make them faulty but simply add to their "uniqueness". These are not machine made they are handmade but artisans.