Porcelanosa Boulder Negro Marquina 30.5×30.5×0.6mm

The Boulder Negro Marquina is rated for wall use in bathrooms, and its glass material is inherently resistant to moisture, making it a practical and visually dramatic choice for shower walls and wet room feature areas. The deep black tones with striking white veining create a bold, marble-inspired look that is particularly impactful in a bathroom setting. We recommend using a good quality waterproof grout and ensuring joints are sealed properly to maintain the tile’s pristine appearance in high-moisture environments.

Unlike gloss mosaics, the matt finish of the Boulder Negro Marquina absorbs rather than reflects light, which softens the overall effect and gives the tile a more understated, tactile quality that closely resembles the appearance of genuine Marquina marble. This makes it particularly well suited to contemporary and classic interiors where a refined, non-reflective surface is preferred, such as feature walls in living rooms, hallways, or bathroom accent panels. The matt finish also tends to show water marks and fingerprints less readily than a gloss surface, which can be a practical advantage in bathrooms and kitchens.

The Boulder Negro Marquina covers at a rate of 10.78 sheets per square metre, which is slightly lower than some other mosaics in the Porcelanosa range due to its 30.5×30.5mm sheet format. To calculate your order, measure the total area of your splashback or feature wall in square metres, multiply by 10.78, and then add a 10% contingency for cuts and wastage around corners and fittings. Because this tile is sold per sheet, ordering a small quantity of extra sheets at the start of your project is strongly recommended to ensure a consistent batch match.