Brazilian Black Slate 1500 x 900mm x 30mm with a natural riven texture that passes the credit card test, engineered for heavy wood-burning stoves, available from our Milton Keynes warehouse.

Brazilian Black Riven Slate Hearth Slab | 1500×900×30mm

★ 4.81 · 468 reviews | In stock
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 Photo Service ⓘ
Premium orders always include a photo of your exact slab before dispatch. Standard orders include it when a cutting or finishing service is added.
Guaranteed Level Surface ⓘ
Guaranteed flat riven texture — a standard credit card slides smoothly across the surface without catching.
STEP 1 · CHOOSE PURCHASE TYPE

FREE Shipping to England & Wales on all full-crate orders! Dispatched directly from our Colchester distribution centre Are you in the trade? Sign in or apply now to unlock direct trade pricing, priority stock, and dedicated support

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STEP 2 · CHOOSE YOUR GRADE
All our grades share the exact same structural quality and durability. Grading is purely based on visual appearance and surface character.
Need help choosing? View Grade Guide →
STEP 3 · ADD A SERVICE (OPTIONAL)
📦 Standard Size | Full Slab Supplied as a complete factory slab—no cutting or post-finishing applied. Fast, direct dispatch
See how our Workshop preps your order →

Workshop services are available for single slab purchases only. For bulk crate processing, please contact our trade desk.

Quantity
Base Slab Price: £160.00 inc. VAT
£160.00 inc. VAT
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Not sure which stone is right? Order a sample first →
£160.00

Key Specifications

  • Dimensions: 1500×900×30mm
  • Material: Brazilian Black Riven Slate
  • Primary use: Wood-burning stove hearths
  • Guarantee: 7-Day Crack Guarantee
  • Photo service: Free photo of your exact slab before dispatch
Overview

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

Looking for the ultimate log burner hearth or fireplace hearth stone? Engineered from direct-from-quarry Brazilian stone, this calibrated 30mm hearth slab combines rugged safety with contemporary style. Featuring a flat, subtle riven surface and clean 90° machine-sawn edges, it can be fully tailored to your exact dimensions through our custom cut slate hearth fabrication service.

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.
  • Guaranteed Level surface: A standard credit card slides smoothly across without catching on sharp ridges on the surface.
  • 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
Product Overview & Suitability

Yes, this 30mm 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: 1500 x 900 x 30mm (+/- 1mm) with clean, 90° machine-sawn edges for a precise, contemporary fit.
  • Weight: 113 kg per slab (2-person lift)
  • Surface Finish: Subtle Natural Riven surface
  • 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
Technical Specifications (Lab Results)

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)
Natural Riven Grading: Standard vs. Premium

We offer two distinct grades for this natural stone, across our full Natural Riven Slate Hearths range and our Slate Hearths range. Both share identical 30mm structural integrity and test results, but differ in visual selection

  • Standard Grade: Celebrates the raw character of natural stone with visible variations in texture, tone and pattern.
  • Premium Grade: Hand-selected for aesthetic harmony; manually sorted to ensure a homogeneous appearance with a consistent colour tone across the surface

See our guide to choosing between Standard and Premium slate grades, including our Credit Card Test for surface quality.

Guaranteed Level surface — The Credit Card Test:
Regardless of grade, every slab must pass our internal surface tolerance test: a standard credit card must slide smoothly across the riven surface without catching or snagging on sharp ridges.

Bespoke Cutting & Fabrication Services

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
2. Deep Clean & Seal Service

Bring out the true character and depth of your natural stone.
  • Process: Each slab is deep-cleaned and washed to remove quarry dust and reveal its natural riven character.
  • The Finish: We apply two coats of Stovax Dressing Oil. For Brazilian Slate, this transforms the raw graphite-grey profile into a deeper, darker, and more luxurious tone.
3. The "Signature Bundle" Package (Best Value)
Our most popular choice for a professional, "high-end" fireplace finish. This package includes everything in the cutting and sealing services, plus:
  • 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 Service & Trade Support

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
Ordering & Delivery
  • 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.
Frequently Asked Questions
How is this slab delivered?
At 1500x900mm this is our largest slab and ships on an oversized pallet. Single slab delivery to England and Wales is £130 inc. VAT. Full crates (12 slabs) are delivered free of charge. Scotland, Northern Ireland, and islands — please request a quote at checkout.
Can I have this cut to a specific size?
Yes — our precision cutting service is available at checkout. Select your required dimensions and choose Express (3-5 days) or Standard batched (10-14 days, save 50%). We cut rectangles, squares, two-piece configurations and pentagons. Complex bespoke shapes are referred to our specialist fabrication partner.
Does the slab come sealed?
No — supplied in its natural state. We recommend applying a stone oil or colour-enhancing sealer before installation. Our Signature Finishing Package includes professional edge honing and pre-sealing at our Milton Keynes workshop.
What is the Free Photo Service?
Before your slab leaves our Milton Keynes yard, we photograph it and send you the picture. You see exactly what is arriving before it leaves us — no surprises on delivery day. Included on all Premium grade orders and all Standard grade orders with a service added.
Can you fabricate custom T-shapes or pentagons to match my site templates?
Can you fabricate custom T-shapes or pentagons to match my site templates? Answer: Yes, we specialise in bespoke fabrication for straight-line shapes, including rectangles, pentagons, and T-shapes. We supply T-shapes as 2-piece sets. From an installer's perspective, this is a significant advantage, as it makes the stone much easier to handle on-site and substantially reduces the risk of cracking during transit or final positioning.
What other sizes does this come in?
This riven slate hearth is also available in 1200×900×30mm, all in the same riven finish and 30mm thickness. (Automatically generated from current sizing — always up to date.)