How Is High Quality Slate Made? Discover the Craft Behind This Timeless Natural Stone
High quality Slate is a highly popular natural stone in the construction and design industries. With its sophisticated look, highly durable nature and universal style, it has become a recurring choice in both classic and modern interiors. But what is it that makes high quality slate stand out? How else is it produced, and what makes some slate products better texture, strength and look? In this post, we will take a closer look at the making of high-quality slate from Coulon Stone – and how it is being used in our earth homes, gardens.

The Origins of High Quality Slate
Slate is a metamorphic rock that is derived from shale after millions of years of underground heat and pressure. The change occurs under the Earth’s crust in clay-rich sediments that get squeezed and crystallised. The geologic process creates a rock that is fine-grained, banded and very hard.
What differentiates good slate from poor is the regularity of the substance and the purity of the minerals of which it is formed. Better slate often has fewer impurities, cracks, or variations.
Ethical Quarrying and Extraction
The high quality slate begins at the quarry. Producers obtain their slate from only managed quarries, which ensures minimal environmental impact also safe working conditions for labourers who quarry the slate. The choice of quarry is vital because the location determines the colour, density, and overall quality of the stone being quarried. Slate is extracted in large blocks using controlled blasting or wire saw cutting. Then the blocks are carefully inspected for any imperfections. Only the best sections are selected for processing into finished products such as paving slabs, floor tiles, wall cladding, hearths, and copings.
Cutting and Shaping the Slate
Once the slate block has been quarried, it’s sent to a facility that uses special machines. These special cutting machines are used to make sure that each piece cut is accurate to dimensions specified by the buyer, which is important for applications like floor tiling or patio paving.
A distinguishing feature of Coulon Stone high quality slate is the attention to detail at this stage. The slate is cut to exact specifications, with crisp edges and uniform surfaces that allow for easy installation and a flawless finish.
Surface Finishing Techniques
One of the unique things about high quality slate is its surface finish. It all depends on the intended use; the slate may be treated to enhance its texture, grip, or appearance. Common finishes which can be achieved include:
- Riven – A natural cleft surface that showcases the stone’s raw beauty.
- Honed – A smooth, matte finish that is soft to the touch and ideal for interiors.
- Calibrated – Uniform thickness for easy fitting, particularly useful for flooring.
- Brushed or Tumbled – Adds an aged or weathered look, suitable for rustic settings.
These finishes are achieved through a combination of traditional craftsmanship and CNC router modern technology machines. Skilled expert work with special machines to bring out the unique characteristics of each slate piece, which enhances its natural beauty but also maintains structural integrity.
Quality Control and Grading
To ensure only the very best and finest slate reaches the marketplace, high quality slate undergoes stringent quality control checks at each stage of its production. Each piece is carefully inspected for:
- Consistency in thickness and dimensions, and that it fits specifications
- Shows an absence of visible cracks or flaws
- That the colour uniformity is showing and is acceptable, it must be aesthetically pleasing
- Surface texture and finish quality
Only slate that passes these rigorous tests is approved for use in premium applications. This level of scrutiny ensures that customers receive a product that not only looks stunning but also performs reliably for decades.

Versatility of High Quality Slate Products
Thanks to the stringent production process and quality checks, it’s made the high quality slate incredibly versatile, and can be used for many applications, such as:
- House Interior flooring – which adds that touch of sophistication with durability in kitchens, bathrooms, and of course living areas.
- Used as outdoor paving – it is weather resistant and especially is slip-proof for patios, pathways, and of course terraces.
- Fireplace and hearths and surrounds – They are perfect because it is Heat-resistant and will give a timelessly stylish look
- Finally garden features – Ideal for being used for edging, steps, and seating areas.
The range of finishes and sizes available means there’s a slate solution for every design need, whether modern or classic in style.