
Serizzo Antigorio: the complete guide
Serizzo Antigorio is a grey gneiss from the Antigorio valley, in the Ossola area, with a dense, regular pattern of light and dark minerals. It is the workhorse stone par excellence: robust, frost-resistant and suitable for stairs, thresholds and exteriors.
History and origin
Serizzo Antigorio takes its name from its valley of origin, in upper Ossola, and is one of the most widespread stones in the construction industry of northern Italy. Thanks to its reliability, it has long been used for steps, plinths, windowsills, kerbs and urban paving. Its understated pattern makes it suitable for both traditional building and contemporary projects. Marmi di Carrara supplies it on request.
Look and veining
The light grey background is speckled with grains of white feldspar and black biotite, with a more or less marked orientation depending on the cut. Cross-cut it looks more speckled, vein-cut more striped, and this difference should be considered when choosing the slabs. Honed, it has a soft grey; flamed, it lightens and becomes rough.
Technical properties (indicative)
| Classification | gneiss (commercially granite) |
|---|---|
| Bulk density | approx. 2,700 kg/m³ (indicative) |
| Mohs hardness | 6-7 |
| Water absorption | low |
| Main use | exteriors and interiors |
| Acid resistance | good: unaffected by food acids or smog |
Recommended uses
It is widely used for interior and exterior stairs, thresholds, windowsills, walkway floors, pavements and cladding. It also works well for kitchen worktops and stone sinks. Its neutral grey can feel cold in residential settings if not balanced by warm woods or fabrics.
Care and maintenance
Dirt and smog are removed with water and neutral or mildly alkaline detergents. A water- and oil-repellent treatment is recommended on kitchen worktops and honed interior floors. On polished steps, avoid repeated use of rock salt in winter.
Pairings
- thermo-treated oak
- Corten steel and black-painted iron
- light grey plaster and exposed concrete
FAQ
Are Serizzo and granite the same thing?
Technically Serizzo is a gneiss, a metamorphic rock; commercially, however, it is classified among granites because it has similar hardness and durability.
Which cutting direction should be chosen?
Cross-cut, it shows a more uniform speckled pattern; vein-cut, it highlights the streaks. For a homogeneous floor it is best not to mix the two cuts.
Is it suitable for a sink or a kitchen worktop?
Yes, its hardness and low porosity make it practical in the kitchen too; the sink is carved from a solid block or made from bonded slabs.
How do I order it?
Write to us specifying elements and dimensions (steps, thresholds, slabs): we send a quote on request and photos of the available material.
Serizzo Antigorio: available on request
We supply this stone as blocks, slabs, tiles and custom-made pieces. Tell us size, thickness and quantity: we will send photos of the available slabs and a quote within 24 hours.
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