Brazilian black brushed slate hearth slab, calibrated flat with a tactile matte brushed face and dressed edges

Brazilian Black Brushed Slate Hearth

£160.00 inc. VAT

★★★★★ 4.84/5 · 694 reviews✓ In stock
Container direct ⓘ
Imported direct from the quarry in Brazil and held in our own yard. No middleman and no showroom markup.
Calibrated flat ±1mm ⓘ
Calibrated flat to ±1mm. The brushed grain is a surface texture, not undulation — the slab beds down without packing and your stove does not rock.
14-day crack guarantee ⓘ
Fit it within 14 days of delivery. If a single slab cracks in that time, we replace it free. Terms ➔

Not the size you need?

We cut brushed slate to your exact size, up to three matching pieces from one slab. From £255.

Not sure which stone is right? Order a sample first ➔

Delivered kerbside on a pallet — please arrange help for the day. At 113 kg the 1500 × 900 × 30mm is the heaviest hearth we stock.

Provide your installer's details and our team will get in touch with them directly.

Overview

Container-direct Brazilian black brushed slate hearths, supplied by Bluesky Stone Direct from Milton Keynes and Colchester. Three stock sizes in 20mm, two in 30mm, all from the same quarry, all held in stock.

Brushed is the textured one. The face is calibrated flat, then mechanically wire-brushed to open a fine directional grain — matte, tactile, and the grippiest of our three finishes underfoot. If you want a mirror-flat satin face, buy the honed hearth; if you want the natural split texture, buy the riven hearth.

What customers say

4.84 out of 5 from 694 reviews, collected by Judge.me.

★★★★★
One word - FANTASTIC !! A very simple but well crafted website made ordering a straightforward process. Communication from Bhey at Bluesky Stone was excellent and customer care was superb. I collected my order and Brian at the workshop was just wonderful. I was late but nothing was too much trouble. He carefully loaded my stone in through the boot of my car helping me make it secure and even went the extra mile by giving me a bottle of cold refreshing water for my long journey home. Fantastic
David Hughes · Standard Riven Slate Hearth · October 2026
★★★★★
Received an incorrect item to begin with but this VERY QUICKLY and SUPERBLY put right by one of the company owners (Leo) who personally drove down to me in London the next day to deliver the correct replacement - this was probably the best customer service I've ever received, which I'm very grateful for. A highly recommended company!
Martin Boronte · Honed Slate Hearth · September 2026
★★★★★
Delighted to find a local company that can supply first class premium product at a competitive price. Easy to order on line using their website and collection notification and process first rate. Highly recommended!
KLL · August 2026

Read all 694 reviews ➔

How it arrives

  1. 1 · You order
  2. 2 · We book your pallet
  3. 3 · Delivered kerbside

Kerbside on a pallet. We recommend a two-person lift.

Specification, sizes and weightsSlip rating, strength, 20mm vs 30mm weights

Stock sizes, weights and crate quantities

Size Thickness Weight Slabs per crate
1200 × 900 20mm 61 kg 15
1500 × 900 20mm 76 kg 12
1200 × 1200 20mm 81 kg 10
1200 × 900 30mm 91 kg 10
1500 × 900 30mm 113 kg 10

All slabs are calibrated to ±1mm with dressed edges as standard — sides honed to remove saw marks, top edges chamfered. 1200 × 1200 is made in 20mm only. Every slab is a two-person lift and is delivered kerbside on a pallet; at 113 kg the 1500 × 900 × 30mm is the heaviest hearth we stock.

Why brushed has no Standard or Premium grade

On riven slate we hand-sort by tone, because a split face varies from slab to slab. Brushing removes that variable — the wire process takes every slab to the same texture and the same graphite tone. There is one grade because there is nothing left to sort, and one price for each size.

On every slab

  • 14-Day Crack Guarantee. Fit your hearth within 14 days of delivery. If a slab cracks in that time, we replace it free.
  • Dressed edges included. Sides honed, top edges chamfered. No raw saw lines to dress on site — on riven that is chargeable work.
  • Container-direct pricing. Brazilian slate bought by the container, not through a UK middleman.
  • Samples. Up to two free samples for a flat £5 delivery. Order a sample — brushed is a finish worth feeling before you commit.

Technical specification

  • Thickness: 20mm or 30mm calibrated, ±1mm
  • Surface: mechanically wire-brushed, fine directional texture, zero cleft
  • Edge: dressed as standard — sides honed, top edges chamfered
  • Slip resistance: PTV 62 dry / PTV 49 wet — low slip risk
  • Flexural strength: 19.6 MPa after 48 freeze-thaw cycles
  • Water absorption: under 0.50% — high frost resistance
  • Colour: graphite grey to black in its raw state. Sealing takes it to a noticeably deeper, darker tone.
  • Suitability: designed for the weight and radiant heat of a wood-burning or multi-fuel stove. Not for direct flame contact.

20mm or 30mm?

Same stone, same finish, same test results. 30mm is heavier, more forgiving of an uneven bed, and reads as a more substantial slab in the room. 20mm suits most standard openings and is easier to handle. 30mm is made in 1200 × 900 and 1500 × 900 only.

How it arrives

  • Unsealed — included. Delivered in 3–5 working days.
  • Deep Clean & Seal — £30. Deep-cleaned to remove quarry dust, then two coats of Stovax Dressing Oil. Sealing settles into the brushed texture and deepens the tone considerably. Allow one extra working day for the oil to dry.

Need a size we don't stock? Cut to Size cuts up to three matching pieces from one slab, from £270 including the slab. Delivered within 14 days, or 7 on Priority.

Delivery and returnsCosts, collection, 14-day returns

Delivery and collection

  • Delivery to England and Wales is priced at checkout — no quote needed, and charged per order rather than per slab.
  • Scotland, Northern Ireland and the Islands — costs vary by postcode, so we quote individually. Call 01908 46 46 56 or email sales@blueskystone.com.
  • Collection from Milton Keynes (MK8 8DD) is booked at checkout, usually ready the next working day.
  • Collection from Colchester (CO6 2JX) is arranged by phone. Call 01908 46 46 56 to confirm availability and any handling fee.
  • Delivered kerbside by pallet via a nationwide carrier.

Buying by the crate?

Full crates carry a lower per-slab rate than single slabs and ship free to England and Wales. Crate quantities vary by size — 15 slabs for 1200×900×20mm, 12 for 1500×900×20mm, and 10 for every other size. See the full-crate page for crate pricing, or open a trade account.

14-day returns on stock sizes

Changed your mind? Tell us within 14 days of delivery, then send the slab back within a further 14 days. No restocking fee. We refund the slab and the original delivery, up to our Economy rate. You arrange and pay the return pallet, which costs about the same as delivery. Sealed slabs can come back too; the sealing charge is not refunded. Cut-to-size pieces are made for you, so they cannot be returned. Returns in full.

Arrived damaged?

Tell us within 48 hours of delivery and we replace it free, delivery included. Damage policy ➔

Questions before you order
What other sizes does this come in?
This brushed slate hearth is also available in Brazilian Black Brushed Slate Hearth — Full Crate, all in the same brushed finish and 30mm thickness. (Automatically generated from current sizing — always up to date.)