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Structure: The JURA GELB is a brown beige limestone. Distributed over the rock arise oxidized brownish ferric oxide separations (Limonit). The JURA GELB is a very popular, well-known and frequently used limestone. Pretty often fossils are stored in the form of ammonite and belemnite.

Characteristics: The JURA GELB counts with a degree of hardness of 3 - 4 in the MOHS hardness scale to the soft rocks. Due to its composition the JURA GELB is frost-sensitively (thus recommend only for the internal area), is as soft rock not scratch-proof and has to be protected before acids.

Emergence: In principle the JURA GELB is a naturally grown material. It consists mostly of calcium carbonate (CaCO₃) with different admixtures, like metallic oxides and color ground connection. In this natural stone occur frequently small veins of different colouring. Originally it is a matter of crevices which arised millions of years ago by reason of huge forces in the rock. In the course of the time however these crevices were again filled up by crystallization and then grew together. These so-called glass- or quartz veins is regarded often falsely as cemented places. It actually is the same substance, of which the remaining stone consists, however in crystalline form, i.e. calcspar. The plates grew intimately together in itself and represent a uniform structure. A higher break sensitivity because of these veins is not given.

 

Such, the Jura pulling through veins, are not to be regarded as errors or defects. They are certification of natural developing - natural elemental force, which affected it approximately 150 million years ago.

Age: Approx. 160 million years (Jura).

Use: Floor mats and wall linings of all kinds, window sills and interior stairs.