Riven Black Limestone Hearth – Bespoke Cut to Size & All Shapes
Riven Black Limestone Hearth – Bespoke Cut to Size & All Shapes - 30mm - Most Popular / Up to - 90cm x 60cm - (XS) is backordered and will ship as soon as it is back in stock.
Bespoke Cut-to-Size Rustic Riven Black Limestone Hearths
Our bespoke cut-to-size rustic riven black limestone hearths are a great choice for anyone looking for a natural stone hearth with plenty of character. Each hearth is made to your exact dimensions using precision CAD-guided machinery, giving a straightforward installation on site.
Our riven black limestone has a natural texture and is our lowest price hearth material. Its finish works well with both traditional fireplaces and modern stove setups.
Tough, heat-resistant and low-maintenance, black limestone is a reliable and practical option for wood-burning stoves, open fires and general fireplace hearth installations. It provides a durable surface with a stunning natural appearance.
For a full breakdown of the stone’s characteristics and technical details, please see the Specification tab where everything is clearly set out.
Easy Ordering Process
- ✓ Select Your Base Size: Choose the base size closest to your required dimensions from the dropdown menu.
- ✓ Choose Edge Details: Pick your preferred finish — square, bevelled, eased or bull-nosed.
- ✓ Upload Your Drawing: Attach your drawing and provide your cut-to-size measurements — we’ll take care of the rest.
Key Features
- ✓ Made to measure — cut exactly to your required size and shape
- ✓ Precision cut using advanced CAD machinery
- ✓ Choice of edge details to suit your installation
- ✓ Fast 5-day delivery option available
- ✓ Clear pricing — no hidden costs or unexpected delays
- ✓ Ideal for clean and quick installation
| Product Specifications | |
|---|---|
| General | |
| Product Name | Kota Black Limestone – Hearth Grade |
| Material Type | Natural limestone |
| Category | Fire hearth slab / fireplace stone |
| Country of Origin | India |
| Thickness Options | 30 mm and 50 mm |
| Colour Description | Charcoal to black with natural tonal movement |
| Surface Finish | Natural finish with orange peel texture with riven features |
| Natural Variation | Medium variation in tone, shading and texture due to the natural formation of the stone |
| Edge Finishing Notes | All edges are precision machine-cut and then hand-sanded if needed. Due to the natural structure of limestone, small sanding marks, slight tonal variations along the edges and occasional tiny micro-chips may be visible. |
| Weight | Approx. 80–135 kg per m² depending on thickness |
| Density | Approx. 2,650 kg per m³ |
| Technical Characteristics | |
| Heat Absorption / Retention | High thermal mass, excellent heat absorption and steady heat dispersal |
| Maximum Temperature Resistance | Typically performs safely up to approx. 300–400 °C before risk of thermal shock. Hearth must not be in direct contact with an open flame. |
| Compressive Strength | Approx. 80–120 MPa |
| Flexural Strength | Approx. 8–12 MPa |
| Porosity | Medium |
| Water Absorption | Approx. 1–2% |
| Thermal Conductivity | Approx. 2.5–3.0 W/mK |
| Chemical Sensitivity | Sensitive to any acid |
| Stain Resistance | Moderate, improved with suitable sealing |
| Salt Sensitivity | Slight, as expected with natural limestone |
| Natural Characteristics of Limestone | |
| General Nature of the Stone | Kota Black Limestone is a natural stone formed over millions of years. Natural variations and features are part of its geological make up and cannot be avoided or deemed as faults. These include tonal changes, mineral markings and texture differences, all of which give the hearth its unique and authentic character. |
| Pyrite / Fools Gold | Pyrite is a natural iron sulphide mineral that can appear as small metallic gold or bronze coloured flecks in the stone. It occurs naturally within black limestone. We carefully select and cut material to reduce visible pyrite, but it is not always possible to avoid. In some cases pyrite may be hidden inside the stone and only becomes visible once the slab is cut to size, often as small spots on the edges. This cannot be detected before cutting and is not considered a defect. |
| Fine Quartz Lines | Fine quartz lines are narrow white mineral lines that form when silica rich minerals fill small natural fractures in the stone. They may appear as thin pale lines or streaks across the surface. We always aim to minimise prominent quartz lines, but some are unavoidable. They are sound, stable and part of the natural structure of the limestone. |
| Surface Rings | Surface rings are subtle circular or halo like markings created by gas bubbles during the hardening of the stone as it formed. These rings can sometimes be seen on the surface as gentle tonal circles. We try to select pieces where these are discreet, but they cannot always be avoided and do not affect performance or strength. |
| White Mineral Deposits | White mineral deposits are lighter patches or markings caused by natural concentrations of calcium or other minerals within the stone. They may appear as soft white spots, veins or cloudy areas. Selection and cutting aim to reduce strong contrast, however these deposits are natural and will still be present in some pieces. |
| Production Enhancements | Where necessary we may use epoxy stone filler, darkening grout pens or localised sanding and smoothing to refine the appearance of the hearth surface and edges. These steps are part of our normal production process and are used to enhance the overall look of the product. They are not considered faults or signs of a lower grade material. |
| Hand-Dressed Edges | Hand-dressed edges are shaped in the quarry before the slabs are shipped to us. This process is carried out using traditional hammer-and-chisel methods to create a more rustic, natural appearance. Because this is a hand-finished technique rather than a precision machine process, natural variation should be expected. The finished edge may appear flatter in some areas and more pitched or angled in others. Some sections may be slightly rougher or more irregular, and occasional small chips or missing fragments can occur where the stone naturally fractures during dressing. These variations are completely normal for genuine hand-dressed stone and are not considered faults. We can only offer hand-dressed edges on three sides in a selection of fixed widths, typically 150cm, 120cm and 90cm. If you request a custom width outside these standard sizes, we will contact you to discuss options. In most cases we can offer either the front edge dressed only or give you the opportunity to amend your required size or choose an alternative edge type. |
| Application & Packaging | |
| Suitable For | Fire hearths, stove bases, fireplace hearths, chamber floors, inglenooks and internal stone features. |
| Application | Fire Hearth |
| Sealing | Sealing is recommended to reduce marking and improve resistance to staining and everyday spills. |
| Installation Notes | Install on a level, load bearing substrate and allow for expansion gaps due to changes in temperature. The hearth should not be in direct contact with open flame. Use suitable adhesives and sealers designed for natural stone. |
| Packaging | Supplied on wooden pallets or in wooden crates with appropriate protective layers. |
| Availability | Supplied in various sizes and cut to size hearths, subject to order requirements and stock. |
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.
Bespoke Cut-to-Size Rustic Riven Black Limestone Hearths
Our bespoke cut-to-size rustic riven black limestone hearths are a great choice for anyone looking for a natural stone hearth with plenty of character. Each hearth is made to your exact dimensions using precision CAD-guided machinery, giving a straightforward installation on site.
Our riven black limestone has a natural texture and is our lowest price hearth material. Its finish works well with both traditional fireplaces and modern stove setups.
Tough, heat-resistant and low-maintenance, black limestone is a reliable and practical option for wood-burning stoves, open fires and general fireplace hearth installations. It provides a durable surface with a stunning natural appearance.
For a full breakdown of the stone’s characteristics and technical details, please see the Specification tab where everything is clearly set out.
Easy Ordering Process
- ✓ Select Your Base Size: Choose the base size closest to your required dimensions from the dropdown menu.
- ✓ Choose Edge Details: Pick your preferred finish — square, bevelled, eased or bull-nosed.
- ✓ Upload Your Drawing: Attach your drawing and provide your cut-to-size measurements — we’ll take care of the rest.
Key Features
- ✓ Made to measure — cut exactly to your required size and shape
- ✓ Precision cut using advanced CAD machinery
- ✓ Choice of edge details to suit your installation
- ✓ Fast 5-day delivery option available
- ✓ Clear pricing — no hidden costs or unexpected delays
- ✓ Ideal for clean and quick installation
| Product Specifications | |
|---|---|
| General | |
| Product Name | Kota Black Limestone – Hearth Grade |
| Material Type | Natural limestone |
| Category | Fire hearth slab / fireplace stone |
| Country of Origin | India |
| Thickness Options | 30 mm and 50 mm |
| Colour Description | Charcoal to black with natural tonal movement |
| Surface Finish | Natural finish with orange peel texture with riven features |
| Natural Variation | Medium variation in tone, shading and texture due to the natural formation of the stone |
| Edge Finishing Notes | All edges are precision machine-cut and then hand-sanded if needed. Due to the natural structure of limestone, small sanding marks, slight tonal variations along the edges and occasional tiny micro-chips may be visible. |
| Weight | Approx. 80–135 kg per m² depending on thickness |
| Density | Approx. 2,650 kg per m³ |
| Technical Characteristics | |
| Heat Absorption / Retention | High thermal mass, excellent heat absorption and steady heat dispersal |
| Maximum Temperature Resistance | Typically performs safely up to approx. 300–400 °C before risk of thermal shock. Hearth must not be in direct contact with an open flame. |
| Compressive Strength | Approx. 80–120 MPa |
| Flexural Strength | Approx. 8–12 MPa |
| Porosity | Medium |
| Water Absorption | Approx. 1–2% |
| Thermal Conductivity | Approx. 2.5–3.0 W/mK |
| Chemical Sensitivity | Sensitive to any acid |
| Stain Resistance | Moderate, improved with suitable sealing |
| Salt Sensitivity | Slight, as expected with natural limestone |
| Natural Characteristics of Limestone | |
| General Nature of the Stone | Kota Black Limestone is a natural stone formed over millions of years. Natural variations and features are part of its geological make up and cannot be avoided or deemed as faults. These include tonal changes, mineral markings and texture differences, all of which give the hearth its unique and authentic character. |
| Pyrite / Fools Gold | Pyrite is a natural iron sulphide mineral that can appear as small metallic gold or bronze coloured flecks in the stone. It occurs naturally within black limestone. We carefully select and cut material to reduce visible pyrite, but it is not always possible to avoid. In some cases pyrite may be hidden inside the stone and only becomes visible once the slab is cut to size, often as small spots on the edges. This cannot be detected before cutting and is not considered a defect. |
| Fine Quartz Lines | Fine quartz lines are narrow white mineral lines that form when silica rich minerals fill small natural fractures in the stone. They may appear as thin pale lines or streaks across the surface. We always aim to minimise prominent quartz lines, but some are unavoidable. They are sound, stable and part of the natural structure of the limestone. |
| Surface Rings | Surface rings are subtle circular or halo like markings created by gas bubbles during the hardening of the stone as it formed. These rings can sometimes be seen on the surface as gentle tonal circles. We try to select pieces where these are discreet, but they cannot always be avoided and do not affect performance or strength. |
| White Mineral Deposits | White mineral deposits are lighter patches or markings caused by natural concentrations of calcium or other minerals within the stone. They may appear as soft white spots, veins or cloudy areas. Selection and cutting aim to reduce strong contrast, however these deposits are natural and will still be present in some pieces. |
| Production Enhancements | Where necessary we may use epoxy stone filler, darkening grout pens or localised sanding and smoothing to refine the appearance of the hearth surface and edges. These steps are part of our normal production process and are used to enhance the overall look of the product. They are not considered faults or signs of a lower grade material. |
| Hand-Dressed Edges | Hand-dressed edges are shaped in the quarry before the slabs are shipped to us. This process is carried out using traditional hammer-and-chisel methods to create a more rustic, natural appearance. Because this is a hand-finished technique rather than a precision machine process, natural variation should be expected. The finished edge may appear flatter in some areas and more pitched or angled in others. Some sections may be slightly rougher or more irregular, and occasional small chips or missing fragments can occur where the stone naturally fractures during dressing. These variations are completely normal for genuine hand-dressed stone and are not considered faults. We can only offer hand-dressed edges on three sides in a selection of fixed widths, typically 150cm, 120cm and 90cm. If you request a custom width outside these standard sizes, we will contact you to discuss options. In most cases we can offer either the front edge dressed only or give you the opportunity to amend your required size or choose an alternative edge type. |
| Application & Packaging | |
| Suitable For | Fire hearths, stove bases, fireplace hearths, chamber floors, inglenooks and internal stone features. |
| Application | Fire Hearth |
| Sealing | Sealing is recommended to reduce marking and improve resistance to staining and everyday spills. |
| Installation Notes | Install on a level, load bearing substrate and allow for expansion gaps due to changes in temperature. The hearth should not be in direct contact with open flame. Use suitable adhesives and sealers designed for natural stone. |
| Packaging | Supplied on wooden pallets or in wooden crates with appropriate protective layers. |
| Availability | Supplied in various sizes and cut to size hearths, subject to order requirements and stock. |
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.
