Marble

Marble is a metamorphic rocks with a crystalline limestone structure formed by the combined action of high pressures and very high temperatures. Marble may be pure (metamorphic origin) or re-composed (sedimentary origin). Marble is not particularly hard (3-4 on the Mohs scale) and is characterized by some degree of variability in the granulometry of components and color shades. The color of marble depends on the presence of mineral impurities (clay, silt, sand, iron oxides and flint/chert nodules); white marble does not contain these impurities.

Granites

Granite is formed by the solidification of magma in high temperature and high pressure conditions. Granulometry is medium-large and occasionally includes mega-crystals. From a physical point of view, granites are extremely compact and have high hardness (6-7 on the Mohs scale) and mechanical resistance values. Granite is resistant to wear, exposure to atmospheric agents and pollution; granites are widely used in the modern building industry, especially for flooring/paving and monuments. Polished or brushed, this hard-wearing and attractive material is often used cooking tops in many kitchen suites.

Travertine

Travertine is a very porous sedimentary limestone, formed by the deposition of calcium carbonate and the subsequent decomposition of the vegetal components incorporated in the mass. It is by no means unusual to find imprints of plant and animal fossils. Incorporated oxides can give travertine colors ranging from milk white to walnut, passing through various shades from yellow to red. This material has reasonable mechanical properties and is widely used in buildings, since low hardness means it is very easy to work.

Onyx

Onyx is a sedimentary rock formed by the precipitation of calcium carbonate in very still underground settings (grottos).
It is characteristically translucent with variegated veins of differing dimensions, generally having shades of brown, that give this marble a multi-colored appearance.
Onyx has always been associated with decorations given its transparent and multi-color appearance; unique aesthetic effects can be achieved when onyx is back-lit with neon or led lighting. Onyx is essentially used in interiors.