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Blue Limestone of Hainaut: natural, local and sustainable elegance that stands the test of time

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Unique, formed millions of years ago at the bottom of the oceans, Blue Limestone of Hainaut is strewn with small fossils. Each piece bears its own history. Each piece is a unique example of its kind. It becomes magical when, due to the surface effects, without any process, it displays a whole range of textures and nuances. Even the most successful copies will not age as well as natural stone. From the intense EnoLuce to the delicate EnoSkin, the multiple tomes and numerous dimensions and applications offer a wide range of possibilities for you to compose your interior or exterior.

100% ‘petit granit’

Blue Limestone of Hainaut, from the Belgian subsoil, is a natural, authentic material whose origins dates back 345 million years, when our regions were submerged by a tropical sea. Trough sedimentation, the fossilised aquatic fauna -crinoids- and flora have become a homogeneous and very compact limestone rock.

A gift of nature, each stone is uniquely shaped. The strength of the rock and its glittering splinters are reminiscent of granite, which is why it is known as ‘petit granite'.

100% natural stone

100% Made in Belgium, Blue Limestone of Hainaut is environmentally friendly. It would be difficult to favour a more local product.

In fact, the blue stone can only be found in one specific carbonated geological vein. This particular vein runs from east to west across Belgium and comes close to the surface in the region of Soignies, in Hainaut, headquarters of the Belgian production.

Extraction and processing ‘Blue Limestone of Hainaut’ takes place at one single site in Soignies, Belgium, in the quarry of Carrières du Hainaut, minimising the ecological footprint of production thanks to the particularly short circuit.

A 100% sustainable material

Blue stone is a durable product par excellence: solid and non-porous, it has a maximum lifespan and offers many possibilities for reuse. No ceramic or composite imitation can compete with the unique, authentic living character of Blue Limestone of Hainaut. While foreign stones with a similar appearance and imitations are destined to be replaced over time, only genuine Belgian blue stone is further enhanced with the patina and is naturally resistant to wear and compression. It resists running water, bad weather and temperature fluctuations. These qualities are present in its natural state that holds up well over time.

The composition of the material

Nature of the stone

Bluestone is a fossiliferous crinoid limestone according to the nomenclature of PTV 844 - precision level 5, registered at the IBN on 23 September 2005 - (NBN EN 12670). This compact limestone of grey-blue colour and of upper Tournaisian stratigraphic age also corresponds to the descriptions written in the NIT 220 " La pierre bleue de Belgique dite Petit Granit d'âge géolo- gique tournaisien" and NIT 228 " Pierres naturelles " of the BBRI.

 

NIT 220 Definition

Belgian blue limestone, also called ‘petit granit’, is a calcite stone with a natural, more or less accentuated bluish-grey colour, characterised by the numerous remnants of crinoids. It is exclusively extracted in Belgium. ‘Petit granit’ is an established name and is appropriate due to the particularly sparkling, shiny aspect of the rock, recalling that of granite. It is preferable to call it ‘blue limestone of Belgium’ to distinguish it from other blue stones with a similar aspect extracted in other countries (mainly Ireland, China and Vietnam).

Macroscopic description

Bluestone is a compact blue-grey limestone, of sedimentary origin, resulting from the accumulation of innumerable fossilised crinoid articles and fragments cemented into a mass of microcrystalline calcite. The stone also contains other fossils such as shells (including brachiopods), corals and bryozoans. On exposure to the weather, the stone takes on a light grey patina.

Petrographic description

The stone to be worked is a bioclastic, crinoid dominant limestone. It is a pack stone, sometimes grain stone (DUNHAM classification) or a biomicrite (FOLK classification). The average composition is 96 to 99% carbonates, 0 to 1% quartz, 0.2 to 0.5% iron salts (mainly sulphides) and 0.2 to 0.4% organic carbon.

THE AUTHENTICITY OF THE STONE

THE AUTHENTICITY OF THE STONE

The visible presence of fossilized crinoids gives Blue Limestone of Hainaut its incomparable character and charm and is proof of the authenticity of this local stone, which is far more resistant than any other stone of a similar appearance. Take a close look at the stone, touch and compare it. You can feel the authenticity of this living material and that makes all the difference.

Proof of provenance

CERTIFICATE OF ORIGINE

Here at Carrières du Hainaut we guarantee the provenance and absolute quality of each of our stones. With every purchase of either finished or half-finished products we provide a document certifying the origin of the stone with a unique code and stamp.

CE QUALITY STANDARDS

The strict quality standards imposed by Carrières du Hainaut exceed even the strictest European ones. Any performance declaration (CE) of our finished products can be easily provided on simple request.

TECHNICAL APPROVAL

Blue Limestone of Hainaut has a technical certificate provided by the Belgian Union for Technical Approval in Construction (ATG).

THE QUALITIES OF THE STONE

This timeless material appeals due to its elegance, sophistication and authenticity. Its solidity, non-porosity and longevity make it a durable stone. Its many qualities, present in its natural state, make it an unalterable rock. Choosing Hainaut Blue Stone means making the choice of a long-term investment and adding value to your property project.

THE QUALITIES OF THE STONE

NATURAL AND LOCAL

DURABLE AND ECOLOGICAL

RECYCLABLE AND REUSABLE

UNEQUALLED QUALITY AND MINERAL BEAUTY

EASILY CLEANED

AUTHENTIC BLUE STONE WITH CERTIFICATE OF ORIGIN

TIMELESS AND LONG-TERM INVESTMENT

ADDED VALUE TO REAL ESTATE

NON-POROUS

COMPACT AND HIGH DENSITY

WEAR AND SHOCK RESISTANT

HEAT RESISTANT

FROST RESISTANT

COMPRESSION STRENGTH

THE VERSATILITY OF STONE

OUTDOOR FLOORING

OUTDOOR WALL COVERING

INDOOR FLOORING

INDOOR WALL COVERING

FURNITURE

NON-SLIP

THE CREATIVE BENEFITS OF THE STONE

EXTENSIVE RANGE OF FINISHES | SHADES

EXTENSIVE RANGE OF DIMENSIONS | THICKNESSES

DESIGN FREEDOM

TECHNICAL SUPPORT

MARKETING SUPPORT

HOW CAN YOU BE SURE YOU’RE CHOOSING THE AUTHENTIC BLUE LIMESTONE OF HAINAUT?

With the globalisation of markets, Belgian blue stone-or petit granit-has witnessed the arrival of many stones of similar appearance, from Asia and elsewhere. Many take undue advantage of Blue Limestone of Hainaut’s excellent reputation. In the same way technology has made it possible to achieve ever more impressive imitation of natural materials such as wood and stone, it has never been able to achieve the technical and aesthetic performance of the authentic blue stone.

 

How can you see the real Blue Limestone of Hainaut and its imitation stones or similar stones of a lesser quality?

These foreign stones simply do not hold the same  qualities. Some oxidise over time because they are not adapted to our applications (technical, frost/defrost cycles, weather conditions ...). The golden rule for lovers of authentic, superior quality natural stone – always ask for a certificate of origin.

 

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