Dear colleagues! In the previous article, we discussed the difference in the application of light beige Jurassic marble for facades and interior finishing. In this article, we would like to focus on another representative of Jurassic stone, namely the gray Jurassic limestone. This type of Jurassic 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 Jurassic 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 completely different when it comes to the use of this type of Jurassic stone in exteriors. Let us explain in more detail.
Classic gray Jurassic marble lies in the lower layers of the massif known as the Upper Jurassic period – the 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 we would like to convey to our esteemed listeners is the areas of application of this type of Jurassic limestone.
All gray Jurassic stone from the lower (1-6) layers can only be used in interiors; otherwise, over time, you may get rusty streaks and destruction due to low frost resistance.
🔍It is worth noting that sometimes Jurassic gray marble is actually supplied as a mixture of gray and beige.
🔍The photo shows a fragment of the facade and a selected sample of gray Jurassic stone. To the naked eye, it is clear that the facade is dominated by beige tones mixed with gray inclusions.
In this article, we want to tell clients and architects that gray Jurassic stone for facades is a beautiful but quite rare material. When selecting this type of stone, one should be guided not by a single sample of A4 format (in fact, this postulate applies to all types of Jurassic 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 Jurassic stone on their facade.