Gris Liso Limestone is a captivating natural stone quarried in Lourinha, Aljubarrota, Alcobaca, Portugal, known for its dark blue to earthy gray coloration and medium-grain texture. This limestone is characterized by the abundant presence of tiny fossil signs, which add a unique visual dimension to its surface, making it an elegant and versatile choice for various architectural and design applications. 

Texture & Pattern:

• Texture: Medium-grained, with a consistent and smooth surface.
• Pattern: Predominantly dark blue to earthy gray tones, enriched by tiny fossil traces that give the stone a natural and organic appearance. 

Test Results & Physical Properties:

• Water Absorption: 0.29% - 0.50% by weight
• Density: 2690 kg/m³
• Compressive Strength: 143.1 - 147.1 MPa
• Flexural Strength: 14.7 - 28.6 MPa
• Hardness (Mohs): 3.0 – 4.0
• Porosity: Low to medium, ensuring good resistance to moisture absorption.

Slip Resistance:

• Polished Finish: Moderate slip resistance, ideal for dry interior applications.
• Honed/Brushed Finish: Higher slip resistance, suitable for wet and outdoor areas. 

Chemical & Mineral Composition (% by weight):

• Calcium Carbonate (CaCO₃): 92% - 95%
• Silica (SiO₂): 3% - 4%
• Iron Oxide (Fe₂O₃): 0.3% - 0.5%
• Magnesium Oxide (MgO): 0.4% - 0.6%
• Alumina (Al₂O₃): 0.3% - 0.5% 

Applications & Usage:

• Interior Applications: Flooring and wall cladding. Kitchen countertops and bathroom vanities. Staircases, fireplace surrounds, and decorative accents.
• Exterior Applications: Facades, paving, and landscaping features. Pool surrounds, patios, and outdoor staircases. 

Maintenance & Care:

• Cleaning: Use mild pH-neutral cleaners. Avoid acidic or abrasive agents that may damage the surface.
• Sealing: Periodic sealing is recommended to protect against moisture absorption and stains, particularly in high-traffic and wet areas.
• Polishing/Restoration: Can be re-polished or refinished to restore its original luster. 

Cutting Sizes (cm & inch):

• Standard Slab Sizes: 250-320 cm x 120-200 cm
• Tile Sizes: 30x30 cm, 30x60 cm, 40x40 cm, 60x60 cm, 60x120 cm, and custom sizes available upon request.
• Thickness Options: 2 cm, 3 cm, and custom thicknesses available. 

Surface Finish Options:

• Polished: Glossy and reflective, enhancing the intricate fossil patterns.
• Honed: Matte and smooth, offering a more subtle and natural look.
• Brushed: Textured and slip-resistant, suitable for outdoor applications.
• Sandblasted: Rough and anti-slip, ideal for exterior paving and landscaping.
• Leathered: Textured with a slight sheen, highlighting the stone’s natural character.
• Tumbled: Aged and rustic appearance with softened edges. 

Shipping & Packaging:

• Packing: Safely packed in wooden crates with foam and plastic protection for slabs and tiles.
• Lead Time: 3-5 weeks depending on order volume and customization.

Gris Liso Limestone’s durability, distinct fossil presence, and versatile color palette make it a preferred choice for both residential and commercial projects, offering a timeless and sophisticated aesthetic.