Serizzo Oira Granite

Serizzo Oira Granite is a type of orthogneiss and a classic example of alpine granite. It is well-known for its predominantly light to medium gray background complemented by darker gray to black mineral grains and occasional softer white accents. This combination creates a subtle yet dynamic visual texture, providing a calm and consistent appearance suitable for both contemporary and traditional architectural styles. The granite is quarried in Crevoladossola, Italy.

Physical and Mechanical Properties:

• Water Absorption: 0.38% by weight
• Density: 2655 kg/m³
• Flexural Strength: 16.5 MPa
• Compressive Strength: 168.0 - 171.0 MPa
• Hardness: High (suitable for heavy-traffic areas)
• Porosity: Low, contributing to its durability and resistance to stains
• Slip Resistance: Generally good, but can vary with surface finish

Chemical and Mineral Composition (% by weight):

• Quartz: Approximately 30-35%
• Feldspar (Plagioclase and Orthoclase): Approximately 40-50%
• Mica (Biotite and Muscovite): Approximately 10-15%
• Other minerals (e.g., accessory minerals): 5-10%

Common Uses:

• Interior Applications: Flooring, countertops, wall cladding, staircases
• Exterior Applications: Facades, paving, outdoor furniture
• Landscaping: Pathways, decorative features

Maintenance:

• Regular cleaning with a mild detergent and water
• Avoid acidic or abrasive cleaners
• Periodic sealing may be required to maintain the surface finish and prevent staining

Available Surface Finish Options:

• Polished: Provides a glossy, reflective surface that enhances color and pattern
• Honed: Offers a smooth, matte finish that is less reflective
• Flamed: Gives a rough texture, enhancing slip resistance, ideal for exterior use
• Brushed: Provides a rustic, textured surface
• Bush-hammered: Creates a heavily textured surface for slip resistance

Serizzo Oira Granite combines aesthetic appeal with functional durability, making it a versatile choice for a wide range of architectural and design applications. Its mechanical properties and natural beauty make it an enduring material option.

Test Result:

 Petrographic Definition: Orthogneiss

• Mass per Unit Volume: 2655 kg/m³
• Water Absorption: 0.38 %
• Compressive Strength (simple): 168 MPa
• Compressive Strength after Freezing: 168 MPa
• Indirect Tensile Strength (by flexure): 16.5 MPa
• Abrasion Coefficient (referenced to Granite St. Fedelino): 0.81
• Impact Resistance (minimum fall height): 79 cm
• Coefficient of Linear Thermal Expansion: 5.8 × 10⁻⁵ °C⁻¹
• Knoop Microhardness: 4209 MPa Non-uniformity
• Index of Hardness: 1.91

* Source: Università di Pisa – Politecnico di Torino