Brazilian Black Honed Slate Hearth Slab | 1200×1200×20mm

Supplied by Bluesky Stone, based in Milton Keynes, specialising in Brazilian slate and limestone hearths available in standard stock sizes or custom-cut for trade and residential installations across England and Wales

Direct-from-quarry Brazilian Black Honed Slate (1200 x 1200 x 20 mm). Engineered with a calibrated 20mm thickness, a super-flat, smooth surface, and fully chamfered, honed edges. Part of our full Honed Slate Hearths range and our Slate Hearths range.

Highlights & Key Features

• Direct-from-Quarry Pricing: Brazilian slate sourced container-direct to avoid retail markups.
• Free Delivery on all full crate orders to England and Wales.
• 14-Day Crack Guarantee: If your slab cracks within 14 days of delivery (provided it is installed within that same 14-day window), we'll replace it completely free.
  
• Free Pre-Dispatch Photo Service: Every premium-grade order includes a free dispatch photo of your exact slab sent straight to you before delivery. Standard-grade slabs also include this service, whenever a custom cutting or finishing service is added.
• Super-Flat Level Surface: The honed surface means there are no undulations, offering a texture as smooth as glass.
  
• Order a sample: Choose up to 2 free samples for a flat £5 delivery fee. See the texture and quality in person before committing to a full slab. Order your sample

Yes, this 20mm slate hearth is designed for heavy or wood-burning stoves and fireplaces

• Heat Resistance: These calibrated slabs are engineered to withstand the weight and heat of a log burner. Not suitable for direct flame.
• Dimensions: 1200 x 1200 x 20mm (+/- 1mm) with dressed sides and edges
• Weight: 81 kg per slab (2-person lift)
• Surface Finish: Machine-honed to a silky, mirror-flat sheen. It features subtle, cloud-like tonal movement produced naturally as the diamond-honing process exposes the internal grain of the stone.
• Edge Finish: Clean 90° machine-sawn
• Colour Profile: In its raw state, the stone features a Graphite Grey to Black profile with natural variation. Once sealed, the stone transforms to a much deeper, darker tone.
• Applications: Ideal for living rooms and dining rooms

This slate has been rigorously tested to ensure it meets the highest safety and durability standards:

• Slip Resistance: PTV 62 (Dry) / PTV 49 (Wet) – Rated as Low Slip Risk
• Flexural Strength: 19.6 MPa (48 Freeze-Thaw Cycles)
• Water Absorption: Less than 0.50% (High Frost Resistance)

Tailored stone solutions for a perfect hearth installation

Our in-house fabrication team based in Milton Keynes provides professional tailoring for our entire range of Brazilian Slate and Limestone slabs. We offer three service tiers:

1. Professional Laser Guided Cutting:

We provide precise laser-guided straight-line cutting to match your dimensions

• Shapes: Squares, rectangles and pentagons
• T-Shape: We can supply 2pc T-Shape solutions - significantly easier to handle and reducing the risk of the stone cracking during transit and installation

• Dressed Edges: We manually ease the edges and hone the sides of your stone (a process we call "dressing").
• The Look: This creates a smooth, chamfered edge that offers a truly wonderful, high-quality aesthetic for modern and traditional homes.
• Exceptional value - dressing the stone is included at no additional cost within this bundle, representing exceptional value

See how our slate cutting, finishing, and sealing services work, from laser-guided cuts to the Signature Bundle finish.

Local to Milton Keynes?

• Free Click & Collect to waive delivery fees entirely.
• Trade-Ready service for local installers who require precision-cut material on short lead times. Contact our team for details.
• Free Samples - collect samples totally free from our warehouse to check colour and texture

• Free Delivery: Applies to all full crates and covers all areas of England and Wales
• Single slab(s): If you're in England or Wales, your delivery cost shows automatically at checkout — no quote needed. Delivering to Scotland, Northern Ireland or the Islands? Delivery costs vary by location, so we provide a free personalised quote instead.
• Nationwide Logistics: Direct-to-site delivery via 3rd-party nationwide pallet delivery. Offloaded by pallet and delivered kerbside
• Customer quotes: Call 01908 46 46 56 or email drawings to sales@blueskystone.com.