The sandstone is ceramic which is characterized by its high hardness and resistance to external agents. It is called stoneware or "stone object" and it lives up to its name and function because sandstone has long been used for architectural decoration. These characteristics are due to its composition. Indeed, the stoneware contains a lot of silica and its firing can reach 1300 C thus, causing vitrification of the material.  If the stoneware has a red color, it is because it was fired in a reducing atmosphere, in an oven deprived of oxygen. On the contrary, if its color is gray,...

Nero Marquina marble is a high-grade black stone marble drawn out from the area of Markina, Northern Spain's Basque Country. It is one of Spain's crucial marbles. It's fine, compact, black grain with white blood vessels that can eventually be really plentiful. The Black Marquina marble provides a substantial manufacturing and well-established markets with incredibly high popularity and needs worldwide. You ought to understand its two primary variations when choosing this certain marble, First selection, and business option. In addition, the Black Marquina is Spain's trustworthy as well as infamous black marble. The Black Marquina surely holds a well-known position...