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Marble · Nero e oro
Nero Portoro Extra.
A deep black ground crossed by highly contrasting golden-yellow veins, one of Italy's most dramatic stones.
01 Identity
Every slab is a landscape.
The amount, continuity and branching of golden markings define the selections; Extra favours the richest and most distinctive pattern.
Selection and variation
High variation; slab selection and matching are essential.
Available values are indicative and must be confirmed for the natural-stone batch, distinguishing it from similarly named agglomerates.
Technical data
Nero Portoro Extra.
| Property | Value | Standard / reference |
|---|---|---|
| Indicative density | 2,68-2,72 g/cm³ | Declared value |
| Indicative water absorption | ≤ 0,15% | Declared value |
| Indicative compressive strength | 130-160 MPa | Declared value |
| Indicative flexural strength | 6-11 MPa | Declared value |