Dear colleagues! In the previous article, we discussed the differences in the use of light beige Jura marble for facades and interior finishes. In this article, we would like to focus on another representative of Jura stone, namely the gray Jura limestone. This type of Jura marble is very popular due to its noble grayish-blue hue. Of course, it also contains the remains of ancient inhabitants of the Jurassic period, which makes it a unique material for finishing.
There are several commercial names for this type of Jura limestone on the market: Jura Grey, Jura PolarBlau, Jura Blue, Jura Grey Blue, Jura Blue, Grabler, etc.
🔍The material is very popular for private interiors, upscale restaurants, hotels, office centers, and fitness clubs.
🔍However, the situation looks quite different when it comes to the use of this type of Jura Limestone in exteriors. Let’s explain in more detail.
The classic gray Jura marble lies in the lower layers of the so-called upper Jurassic period massif – Malm formed 135 million years ago. Typically, this is from the 1st to the 6th layer of the massif. Sometimes this type is found in the upper 21st layer, but its volumes are smaller and most often they are not purely gray but gray-beige, for example JuraLimestone Jura Melange.
The main idea that we would like to convey to our esteemed listeners is the areas of application of this type of Jura Limestone.
All gray Jura Limestone from the lower (1-6) layers can only be used in interiors; otherwise, over time, rust stains and deterioration may occur due to low frost resistance.
🔍It is worth noting that sometimes Jura Grey marble is actually supplied as a mix of grey and beige.
🔍The photo shows a fragment of the facade and a selected sample of gray Jura Limestone. To the naked eye, it is evident that beige tones dominate the facade, interspersed with gray inclusions.
In this article, we want to inform clients and architects that gray Jura Limestone for facades is a beautiful but quite rare material. When selecting this type of stone, one should be guided not by a single A4 sample (this principle applies to all types of Jura marble) but by a selection of slabs, where a conscientious supplier will present a representative slab, as well as options for slabs with possible beige inclusions. We adhere to the rule that the client should know the real picture of this stone, rather than being surprised why there is a cheap mix instead of gray Jura Limestone on their facade.