Cobalt Quartzite is a visually captivating natural stone quarried in Brazil, renowned for its striking aesthetic that typically features a mesmerizing blend of khaki green, deep grays, blues, golds, beige, and white flowy veins. This unique combination of colors makes it a popular choice for luxurious interior and exterior applications. Below, I provide detailed descriptions and lists of its physical and mechanical properties, chemical and mineral compositions, usage, maintenance, cutting sizes, and common surface finish options.
Physical and Mechanical Properties
- Water Absorption:Typically low, around 0.18% to 0.35%.
- Density:Approximately 2.67 to 2.72 g/cm³.
- Flexural Strength:Ranges between 12 to 16 MPa.
- Compressive Strength:Typically around 140 to 200 MPa.
- Hardness:Generally around 6-7 on the Mohs scale.
- Porosity:Low porosity, making it relatively resistant to staining.
- Slip Resistance:Varies depending on surface finish; honed or textured finishes offer better slip resistance.
Chemical and Mineral Compositions (% by weight)
- Silicon Dioxide (SiO2):Primarily composed of quartz, making up 70-90% of the stone.
- Aluminum Oxide (Al2O3):Typically present in small amounts, around 5-15%.
- Iron Oxide (Fe2O3):Responsible for some of the coloring, present in trace amounts.
- Magnesium Oxide (MgO), Calcium Oxide (CaO), Potassium Oxide (K2O), and Sodium Oxide (Na2O):Present in minor quantities, each typically below 5%.
Usage
Interior Applications:
- Kitchen countertops
- Bathroom vanities
- Flooring and wall cladding
- Decorative elements
Exterior Applications:
- Facades
- Pool surrounds
- Patios and walkways
Maintenance
- Sealing:Regular sealing recommended to maintain its resistance to staining.
- Cleaning:Use pH-neutral cleaners; avoid acidic or harsh agents.
- Polishing:Periodic polishing to maintain its sheen and appearance.
Cutting Sizes (cm)
- Slabs:Commonly available in sizes like 2 cm and 3 cm thickness.
- Tiles:Typical custom sizes include 30x30, 60x30, 60x60, and larger slabs can be cut to preference.
Surface Finish Options
- Polished:High gloss, enhances color and veining.
- Honed:Smooth, matte finish, offers natural look.
- Brushed/Leathered:Textured finish, enhances slip resistance.
Cobalt Quartzite is a versatile and durable material, suitable for a variety of applications due to its aesthetic appeal and robust physical properties. Proper maintenance ensures its longevity and retains its striking visual characteristics.
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United States
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