Honed Black Slate Hearth – Standard Rectangle Cut to Size
Honed Black Slate Hearth – Standard Rectangle Cut to Size - 30mm / Up to - 90cm x 60cm - (XS) is backordered and will ship as soon as it is back in stock.
Related Products
Express Honed Black Slate Hearths
Our Express Black Honed Slate Hearths are produced for those that need a slate hearth fast, delivered in as little as 3 working days, making them the ideal choice for quick turnarounds, last-minute installations or when another supplier has let you down.
Each hearth is cut to your requested dimensions using our high-precision CAD machinery, ensuring accuracy and a clean, professional finish.
These Honed Black Slate Hearth are produced using premium natural slate with a smooth honed finish. Every piece is supplied unsealed with clean sawn edges, ready for you to seal, finish or trim as required on site.
To fully understand the material and its natural characteristics, please refer to the Specification tab, where all technical details and natural tolerances are listed clearly.
Easy Ordering Process
- ✓ Select the base size closest to your required dimensions from the dropdown
- ✓ Enter your cut-to-size measurements — we’ll handle the rest
Key Features
- ✓ Square or rectangular only for fast processing
- ✓ Precision cut to your requested size
- ✓ Clean sawn edges – supplied unsealed
- ✓ Fast 3-day delivery across the UK
- ✓ No hidden costs or delays
- ✓ Ideal for on-site trimming or DIY fitting
If you require a more complex shape, angled cuts or a detailed edge profile, explore our Bespoke Cut-to-Size Slate Hearth options.
| Product Specifications | |
|---|---|
| General | |
| Product Name | Brazilian Black Slate – Honed Hearth Grade |
| Material Type | Natural slate |
| Category | Fire hearth slab / fireplace stone |
| Country of Origin | Brazil |
| Thickness Options | 30 mm |
| Colour Description | Blue-black base tone, Subtle graphite and charcoal movement deepens further when sealed. |
| Surface Finish | Machine-honed, smooth and flat surface with a soft low-sheen finish. |
| Natural Variation | Low–medium variation in tone and mineral movement; honing reduces surface texture but natural character remains visible. |
| Edge Finishing Notes | All edges are machine-cut and hand-sanded. Small sanding marks or slight tonal variation along the edge may be visible. |
| Weight | Approx. 70–140 kg per m² depending on thickness. |
| Density | Approx. 2,800–2,900 kg per m³. |
| Technical Characteristics | |
| Heat Absorption / Retention | Excellent thermal mass — absorbs heat and releases it slowly. |
| Max Temperature Resistance | Approx. 450–500 °C. Must not contact open flame. |
| Compressive Strength | Approx. 100–150 MPa. |
| Flexural Strength | Approx. 15–25 MPa. |
| Porosity | Low–medium; honed surfaces may mark more easily if unsealed. |
| Water Absorption | Approx. 0.3–1.0%. |
| Thermal Conductivity | Approx. 2.0–2.5 W/mK. |
| Chemical Sensitivity | Resistant to weak acids; strong acids may lighten honed surfaces. |
| Stain Resistance | Moderate, sealing is strongly recommended. |
| Salt Sensitivity | Low. |
| Natural Characteristics | |
| General Nature | Brazilian black slate is a natural metamorphic stone originally formed in layers. For honed hearths, the surface is mechanically ground to create a flatter, smoother finish. Honing reduces relief but does not remove the natural tonal and mineral movement. |
| Colour Profile | Slate labelled “black” is actually a blue-black shade rather than a pure deep black. Graphite, charcoal and soft tonal variations are common. When sealed, the colour deepens to a richer uniform tone. |
| Mineral Movement | Natural mineral distribution may produce cloudy areas, soft streaks, lighter/darker patches or subtle veining. These features are inherent to the stone and ensure every piece is unique. |
| Honed Surface Features | The honing process may result in faint tooling lines, micro-pits, small filled areas or slight sheen differences. These characteristics are normal and typical of honed natural stone. |
| Pyrite / Fools Gold | Occasional tiny metallic gold or bronze pyrite flecks may appear naturally within the stone or on cut edges. These are natural inclusions and not defects. |
| Production Enhancements | Enhancements may include epoxy fillers, localised smoothing, edge refinement or colour-enhancing treatments. These are standard practices for honed natural stone. |
| Application & Packaging | |
| Suitable For | Fire hearths, stove bases, inglenooks, chamber floors. |
| Application | Internal use only. |
| Sealing | Strongly recommended to deepen colour and reduce marking. |
| Installation Notes | Install on a stable, level substrate. Keep away from direct flame. |
| Packaging | Supplied on wooden pallets/crates with protective layers. |
| Availability | Cut-to-size: 30 mm. |
At Primethorpe Paving, we strive to provide clear and straightforward delivery options to make your shopping experience seamless and transparent.
Below is a detailed breakdown of our delivery services.
Free Delivery*
Eligibility: Available on orders of £750 or more — this can include a single item or a combination of any products on our website.
Timeframe: 3–5 business days (exact delivery date provided at checkout)
Details: Enjoy complimentary delivery with no hidden fees on all eligible orders of £750 or more.
Exclusion Postcodes: IV40–49, IV51–54, KW15–17, HS, PA20, ZE, PA21–38, PA41–49, PA60–78, KA27–28, PH42–44, PO30–41, IM, JE, GY, BT — These postcodes will be charged at a higher delivery cost, provided upon enquiry.
Standard Delivery (£65)
Cost: £65
Timeframe: 3–5 business days
Details: Available for all orders under £750. Reliable delivery within the stated timeframe.
Exclusion Postcodes: IV40–49, IV51–54, KW15–17, HS, PA20, ZE, PA21–38, PA41–49, PA60–78, KA27–28, PH42–44, PO30–41, IM, JE, GY, BT — These postcodes will be charged at a higher delivery cost, provided upon enquiry.
Express Delivery (Additional £30)
Cost: +£30 on top of Standard Delivery
Timeframe: 1–2 business days
Details: Ideal for urgent orders. Orders placed before 12 PM are processed and shipped the same day.
Note: For orders over £750, you can upgrade to Express Delivery for an additional £30.
Smaller Items Delivery (£10)
Items: Jointing compound, cement, sealer, slurry, etc.
Cost: £10 per item
Additional Cost: £10 per additional item (up to 6 items). After 6 items, a flat rate of £60 applies.
Recess Covers Delivery (£20)
Cost: £20 per item
Additional Cost: £20 per additional item (up to 3 items). After 3 items, a flat rate of £60 applies.
Installation Essentials with Paving Orders (Free)
Cost: Free
Details: When smaller items or installation essentials (e.g., jointing compound, recess covers) are ordered alongside paving, cobble, walling, coping, or hearth products — delivery for these items is free.
Samples Delivery (Free)
Cost: Free
Details: All sample orders qualify for free delivery.
Bespoke Made-to-Measure Items Details:
Bespoke or made-to-measure items may take longer to deliver due to their custom nature. However, you will always receive an exact delivery date at checkout, so you’ll know precisely when to expect your order.
Express Honed Black Slate Hearths
Our Express Black Honed Slate Hearths are produced for those that need a slate hearth fast, delivered in as little as 3 working days, making them the ideal choice for quick turnarounds, last-minute installations or when another supplier has let you down.
Each hearth is cut to your requested dimensions using our high-precision CAD machinery, ensuring accuracy and a clean, professional finish.
These Honed Black Slate Hearth are produced using premium natural slate with a smooth honed finish. Every piece is supplied unsealed with clean sawn edges, ready for you to seal, finish or trim as required on site.
To fully understand the material and its natural characteristics, please refer to the Specification tab, where all technical details and natural tolerances are listed clearly.
Easy Ordering Process
- ✓ Select the base size closest to your required dimensions from the dropdown
- ✓ Enter your cut-to-size measurements — we’ll handle the rest
Key Features
- ✓ Square or rectangular only for fast processing
- ✓ Precision cut to your requested size
- ✓ Clean sawn edges – supplied unsealed
- ✓ Fast 3-day delivery across the UK
- ✓ No hidden costs or delays
- ✓ Ideal for on-site trimming or DIY fitting
If you require a more complex shape, angled cuts or a detailed edge profile, explore our Bespoke Cut-to-Size Slate Hearth options.
| Product Specifications | |
|---|---|
| General | |
| Product Name | Brazilian Black Slate – Honed Hearth Grade |
| Material Type | Natural slate |
| Category | Fire hearth slab / fireplace stone |
| Country of Origin | Brazil |
| Thickness Options | 30 mm |
| Colour Description | Blue-black base tone, Subtle graphite and charcoal movement deepens further when sealed. |
| Surface Finish | Machine-honed, smooth and flat surface with a soft low-sheen finish. |
| Natural Variation | Low–medium variation in tone and mineral movement; honing reduces surface texture but natural character remains visible. |
| Edge Finishing Notes | All edges are machine-cut and hand-sanded. Small sanding marks or slight tonal variation along the edge may be visible. |
| Weight | Approx. 70–140 kg per m² depending on thickness. |
| Density | Approx. 2,800–2,900 kg per m³. |
| Technical Characteristics | |
| Heat Absorption / Retention | Excellent thermal mass — absorbs heat and releases it slowly. |
| Max Temperature Resistance | Approx. 450–500 °C. Must not contact open flame. |
| Compressive Strength | Approx. 100–150 MPa. |
| Flexural Strength | Approx. 15–25 MPa. |
| Porosity | Low–medium; honed surfaces may mark more easily if unsealed. |
| Water Absorption | Approx. 0.3–1.0%. |
| Thermal Conductivity | Approx. 2.0–2.5 W/mK. |
| Chemical Sensitivity | Resistant to weak acids; strong acids may lighten honed surfaces. |
| Stain Resistance | Moderate, sealing is strongly recommended. |
| Salt Sensitivity | Low. |
| Natural Characteristics | |
| General Nature | Brazilian black slate is a natural metamorphic stone originally formed in layers. For honed hearths, the surface is mechanically ground to create a flatter, smoother finish. Honing reduces relief but does not remove the natural tonal and mineral movement. |
| Colour Profile | Slate labelled “black” is actually a blue-black shade rather than a pure deep black. Graphite, charcoal and soft tonal variations are common. When sealed, the colour deepens to a richer uniform tone. |
| Mineral Movement | Natural mineral distribution may produce cloudy areas, soft streaks, lighter/darker patches or subtle veining. These features are inherent to the stone and ensure every piece is unique. |
| Honed Surface Features | The honing process may result in faint tooling lines, micro-pits, small filled areas or slight sheen differences. These characteristics are normal and typical of honed natural stone. |
| Pyrite / Fools Gold | Occasional tiny metallic gold or bronze pyrite flecks may appear naturally within the stone or on cut edges. These are natural inclusions and not defects. |
| Production Enhancements | Enhancements may include epoxy fillers, localised smoothing, edge refinement or colour-enhancing treatments. These are standard practices for honed natural stone. |
| Application & Packaging | |
| Suitable For | Fire hearths, stove bases, inglenooks, chamber floors. |
| Application | Internal use only. |
| Sealing | Strongly recommended to deepen colour and reduce marking. |
| Installation Notes | Install on a stable, level substrate. Keep away from direct flame. |
| Packaging | Supplied on wooden pallets/crates with protective layers. |
| Availability | Cut-to-size: 30 mm. |
At Primethorpe Paving, we strive to provide clear and straightforward delivery options to make your shopping experience seamless and transparent.
Below is a detailed breakdown of our delivery services.
Free Delivery*
Eligibility: Available on orders of £750 or more — this can include a single item or a combination of any products on our website.
Timeframe: 3–5 business days (exact delivery date provided at checkout)
Details: Enjoy complimentary delivery with no hidden fees on all eligible orders of £750 or more.
Exclusion Postcodes: IV40–49, IV51–54, KW15–17, HS, PA20, ZE, PA21–38, PA41–49, PA60–78, KA27–28, PH42–44, PO30–41, IM, JE, GY, BT — These postcodes will be charged at a higher delivery cost, provided upon enquiry.
Standard Delivery (£65)
Cost: £65
Timeframe: 3–5 business days
Details: Available for all orders under £750. Reliable delivery within the stated timeframe.
Exclusion Postcodes: IV40–49, IV51–54, KW15–17, HS, PA20, ZE, PA21–38, PA41–49, PA60–78, KA27–28, PH42–44, PO30–41, IM, JE, GY, BT — These postcodes will be charged at a higher delivery cost, provided upon enquiry.
Express Delivery (Additional £30)
Cost: +£30 on top of Standard Delivery
Timeframe: 1–2 business days
Details: Ideal for urgent orders. Orders placed before 12 PM are processed and shipped the same day.
Note: For orders over £750, you can upgrade to Express Delivery for an additional £30.
Smaller Items Delivery (£10)
Items: Jointing compound, cement, sealer, slurry, etc.
Cost: £10 per item
Additional Cost: £10 per additional item (up to 6 items). After 6 items, a flat rate of £60 applies.
Recess Covers Delivery (£20)
Cost: £20 per item
Additional Cost: £20 per additional item (up to 3 items). After 3 items, a flat rate of £60 applies.
Installation Essentials with Paving Orders (Free)
Cost: Free
Details: When smaller items or installation essentials (e.g., jointing compound, recess covers) are ordered alongside paving, cobble, walling, coping, or hearth products — delivery for these items is free.
Samples Delivery (Free)
Cost: Free
Details: All sample orders qualify for free delivery.
Bespoke Made-to-Measure Items Details:
Bespoke or made-to-measure items may take longer to deliver due to their custom nature. However, you will always receive an exact delivery date at checkout, so you’ll know precisely when to expect your order.
