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PIEDRAS MARAGATAS, S. L. extracts the "maragata" stone from its quarry situated at Santa Colomba de Somoza. The "maragata "stone is a quartzite one. Once extracted, it is cut in layers with different thicknesses.
Its origin is metamorphic, of Late Ordovician-Silurian, and it contents 70% quartz, 20% phyllosilicates and 10% brown-reddish oxides.
Stone characteristics:
| Specific gravity | 2,57 gr/cm3 |
|---|---|
| Absorption coefficient | 1,03% |
| Compressive strength resistance | 746 kg/cm2 |
| Flexural strength resistance | 110 kg/cm2 |
| Resistance to wear | 3,82 mm |
| Impact resistance | 95 cm |
| SO2 resistance | 0,11% |
Flat layers of bigger thickness are used for masonry in lodgings whethther in- or outdoors. They are processed at quarry by cutting and shaping them with chisel to get 10 cm thickness pieces to make the fitting easier.
They are marketed in big 1,50 t bales.
Flat layers of lesser thickness and irregular shape are sorted out according to their thickness of 1 - 3 cm and 3 to 5 cm. They are used in wall cladding and pavements.
They are delivered by packets of 1 m3.
Irregular shaped stones of several sizes are marketed in loose to use in landscape gardening, ancient buildings restoration, etc.