Brazilian black riven slate hearth slab, calibrated flat with 90 degree machine-sawn edges, natural cleft surface

Slate Hearth, Cut to Your Size

Enter your cutting size inc. VAT

★★★★★ 4.84/5 · 694 reviews✓ Slab in stock
Photo of your slab ⓘ
Every Cut to Size order includes a photo of the slab your pieces come from, before it goes on the saw.
Credit card flat ⓘ
A standard credit card slides smoothly across the surface without catching.
14-day crack guarantee ⓘ
Fit your pieces within 14 days of delivery. If one cracks in that time, we replace it free. Terms ➔

Measure the opening, not the stove.

Length × width, in millimetres

Cutting, cleaning and sealing included. The main hearth will have its edges dressed (honed sides and eased top edge). One charge covers up to three pieces.

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

Cut work can't come back, so please measure twice.

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

Overview

Brazilian black slate cut to your size by Bluesky Stone Direct in our Milton Keynes workshop: riven, honed or brushed, 20mm or 30mm. Up to three pieces from one slab, so a chamber and front hearth match. Edges dressed, cleaned and sealed.

Rectangles and squares, cut properly. If your opening needs a circle, a teardrop or a curve, we're not your supplier, and we'll say so rather than waste your time.

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 cut, seal and send your photo
  3. 3 · We book your pallet
  4. 4 · Delivered kerbside

Kerbside on a pallet, or collect free from Milton Keynes. We recommend a two-person lift.

Specification and cutting limitsLargest piece, smallest side, saw cut, up to 3 pieces
MaterialBrazilian black slate
FinishesRiven · Honed · Brushed
Thickness20mm or 30mm (30mm from our 1200 × 900 and 1500 × 900 slabs)
GradesRiven: Standard or Premium. Honed and brushed: one grade
Largest piece1500 × 900mm or 1200 × 1200mm
Smallest side50mm
Saw cutabout 10mm lost per pass
Pieces per orderup to 3, from one slab
Edgesmain hearth: honed sides and eased top edge
Arrivesdeep cleaned and sealed
Cutting charge£125 Standard, delivered within 14 days · £175 Priority, delivered within 7 days
Cut atMilton Keynes workshop
Delivery and returnsCosts, collection, cut pieces can't be returned
DeliveryKerbside on a pallet across England & Wales, one charge per order. Standard: delivered within 14 days. Priority: within 7 days. Day 1 is the day after you order; if the last day isn't a working day, it's the next working day.
CollectionFree from our Milton Keynes workshop (MK8 8DD), within the same 14 or 7 days. We email you the moment it's ready.
Over Christmas and public holidaysDates can move. We'll tell you if yours does.
Scotland, Northern Ireland and islandsQuoted separately. Call 01908 46 46 56.
ReturnsCut pieces are made to your sizes, so they can't be returned. Please measure twice, or order a sample first.
Crack guaranteeFit your pieces within 14 days of delivery. If one cracks in that time, we replace it free. Terms ➔
Arrived damaged?Tell us within 48 hours of delivery and we replace it free, delivery included. Damage policy ➔
Questions before you order
How does Cut to Size work?
Choose the finish, thickness and grade, then enter the finished sizes you want in millimetres. The page shows how your pieces come off one slab and the full price. We cut them, dress the edges, clean and seal them in our Milton Keynes workshop, then deliver on a pallet or you collect free.
How long does it take?
Standard (£125): delivered within 14 days. Priority (£175): delivered within 7 days. Day 1 is the day after you order; if the last day isn't a working day, it's the next working day. England and Wales. Please book your fitter once your hearth has arrived.
Why does a smaller piece cost the same as a larger one?
You pay for the slab your pieces are cut from. Once it goes on the saw it's committed to your order.
Can I return a cut piece?
No — it's made to your sizes, so please check your measurements, or order a sample first.
What size should I give you?
The finished size you want to see, in millimetres. Measure the opening, not the stove, and check your stove maker's minimum hearth size.
Do I get a photo?
Yes. We photograph the slab your pieces come from before it goes on the saw and email it to you.
Can I collect?
Yes, free from Milton Keynes, within the same 14 or 7 days. We email you the moment your pieces are ready.