Onyx Nero brings a busy grey, black and white swirl to the "Onyx – DC" collection as a polished 60x60 CM double charge tile with a marble look. Tight wavy bands of grey, black and white run diagonally across the face, threaded with copper-brown streaks. The tile has a glossiness of > 70% (Gloss meter 60°) and water absorption of < 0.05% (ISO-10545-3). Breaking strength is > 2200 N, with a modulus of rupture of > 40 N/mm2 (ISO-10545-4). Surface abrasion resistance is Class PEI 4 (2100 revolutions) (EN 154), scratch hardness 5 on the Mohs scale and stain resistance Class 5. Frost and thermal shock resistance are both rated Pass, and reaction to fire is Class A1 - A1 fl.