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Made to last.

Our Stone

Caithness flagstone is a Devonian sandstone, named after the Northern Scottish county in which it is most abundant

and famous for its jet black appearance when polished. The flagstone is unrivalled in its versatility and durability,

as a result of this, it can be found around the world in paving, architecture and, more recently, interiors.

We've spent a long time getting to know the properties of this fascinating material and discovering how best to

apply its exceptional properties to stylish and practical solutions for modern living interior and exterior projects.


All quarrying, processing, hand finishing and quality control checks are done by us at source in Caithness,

shipping orders around the UK and beyond. Over 25 years' combined experience means we know

exactly which layer to extract and how to cut and finish the stone to ensure a stunning end product.

We are giving new Life to a 400 million year old natural material so make sure to browse

our product range , meet our team and check out our downloads and awards pages.

The History of Caithness flagstone

Caithness flagstone was formed some 370 million years ago as result of subsidence and deposition in a

structural basin known as the Orcadian Cuvette, also known as Lake Orcadia. The material was believed

to have been discovered by Stoneage farmers who used it to structure their impressive tombs.

In the 19th century the Caithness flagstone industry was buoyant, and the material was shipped all over the

world from 11 major quarries in Caithness. It was during this time that the 'Spittal beds' were discovered to

contain the finest grade material for strength and durability combined.

Norse Stone operates two quarries in Caithness - Lieurary and Banniskirk, both are located near the village of Halkirk.

These are within the Spittal beds, giving us access to the best Caithness flagstone available.

For more about the history of the Caithness flagstone industry, visit the Castlehill Heritage Centre.

Technical Specifications

Caithness flagstone's striking appearance and exceptional strength makes it highly sought after

for public spaces, corporate interiors, building projects and high end residential architecture. 

This high-density sedimentary sandstone is extracted from a 3 m high bed and quarried from 16

principle layers. These layers are split into a total of 49 individual flagstones, ranging in thickness

from 20 mm to 160 mm. We carefully select our stone from the layer best suited to the end use.

Caithenss flagstone technical properties and test results


Caithness Flagstone is from the Old Red Sandstone of Devonian age. It is very fine grained with a

dark grey colour which weathers to various colours dependent on the iron content in the area of

extraction. When polished, the hewn stone finishes darker and more consistent in colour, giving

Caithness Flagstone its signature, striking dark look.

See it for yourself, we are always happy to provide samples of our stone.

Quality Assurance

We understand the design and build process and are routinely selected as a supplier where

Caithness flagstone is specified. We quarry, cut, finish and deliver all material to specification.

To ensure the highest standards of products, Norse Stone is ISO 9001:2015 certified.

Find out more on our accreditations page.

Our Stone
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