Mercury Onyx is a glossy 600 x 1200 mm PGVT (polished glazed vitrified tile) in a soft pale grey onyx look. Thin tan veins and bright white crackle lines wander across the surface in broad, cloud-like sections. The design comes in 5 faces, giving more variation between tiles across a large laid area. Each box holds 2 pieces, weighs approx. 32 Kgs and covers 1.44 sqm. Tile thickness is listed as approx. 9.