From Quarry to Project
Behind every striking installation of VALONGO BLACK™ Slate is a story of craftsmanship, heritage, and precision. This isn’t just stone—it’s a piece of Portugal’s geological legacy, extracted with care and delivered with purpose. At Porto Slate Importers, we believe in transparency and quality, which is why we want to take you behind the scenes to show exactly how VALONGO BLACK™ Slate goes from quarry to your job site.
Step 1: Sourced from the Heart of Portugal
The journey begins in Valongo, Portugal, where slate has been quarried for generations. This region is internationally recognized for its high-density black slate, and VALONGO BLACK™ Slate is among its most prized exports.
The slate is carefully extracted using controlled, low-impact quarrying techniques to preserve both the quality of the stone and the natural landscape. Unlike mass-produced stone products, this slate is hand-selected for uniformity, structural integrity, and color richness.
Step 2: Expert Cutting and Finishing
Once extracted, the raw blocks are transported to local finishing facilities at the quarry, where skilled workers cut, calibrate, and finish the stone to project specifications. Each piece undergoes a thorough inspection for consistency in thickness, texture, and tone.
Clients can choose between different finishes—like Natural Cleft for texture and grip, or Honed for a sleek, refined look. This step is critical in transforming raw stone into architectural-grade material ready for a wide range of applications.
Step 3: Quality Control & Packaging
Before leaving Portugal, every shipment of VALONGO BLACK™ Slate goes through a strict quality assurance process. Any piece that doesn’t meet our standards is rejected. Once approved, the stone is carefully packaged for international shipment—protected to avoid chipping, cracking, or moisture damage during transit.
Step 4: Imported Exclusively by Porto Slate Importers
Here’s where the story gets exclusive: Porto Slate Importers is the only supplier of VALONGO BLACK™ Slate in the USA.
Once it arrives stateside, our team inspects and handles each shipment with the same attention to detail seen throughout the process. Whether the order is for a boutique residential project or a massive commercial build, we ensure that every client receives slate that is consistent, premium-grade, and ready to install.
Step 5: Delivered to Your Project Site
We coordinate reliable, streamlined logistics to deliver the stone directly to your project. Our distribution network is designed to accommodate everything from small-batch orders to full-scale container loads.
You’re not just receiving stone—you’re receiving a material that has been carefully handled from the moment it left the quarry to the moment it’s laid on your floor, wall, or facade.
Why This Journey Matters
Understanding where your materials come from—and how they’re treated along the way—adds confidence to your build. With VALONGO BLACK™ Slate, you’re not taking a gamble on imported stone of questionable origin. You’re choosing a proven, premium product with a clean, traceable supply chain and a team that stands behind it.
Trace the Story. Trust the Stone.
Whether you're building something bold, elegant, or enduring, knowing the story behind VALONGO BLACK™ Slate gives your project more meaning. From the hills of Valongo to the hands of your installer, every piece of this slate has traveled with care.
Start your project with slate that tells a story. Contact Porto Slate Importers today.