Jura Grey Limestone From Germany
Please click on image to enlargen, this is an average sample only. Your monitor settings may affect appearance.
Description: Jura Grey Limestone is a commercial name for a yellow to grey limestone of the Jurassic period, one of Germany's most well-known natural stones. This stone internationally may be nominated as a marble but in the area of application of the European Standard this stone must be nominated as limestone. The veining and colour varies and a small sample of Jura Grey may not be representative of the whole slab therefore swatch samples must be approved for large projects to ensure that the blocks are all extracted from the same quarry face for matching purposes. During the polishing process a clear epoxy resin filler may be used to fill any micro fissures or tiny pitting however this does not affect the integrity of the stone, it merely provides an even smoother surface finish. Jura Grey is ideal for both interior and exterior use however polish is only constant inside.
The following colours are available Jura Gelb (Jura Gold/Yellow), Jura Gemischtfarbig (Jura Mixed Colour) and Jura Grau (Jura Grey). The "normal" colour of Jura Marmor limestone is grey but through the influence of iron-bearing water the grey colour often changes into yellow.
Products: Suitable for construction projects both commercial and domestic, prefabricated countertops/worktops, vanities, tiles, backsplashes, paving, fireplaces and memorials.
Surface Finish: Jura Grey Limestone looks best with a gloss polished surface but is also available as honed, leather/satin, river-washed/antique, thermal/flamed, brushed and sandblast finish.
Sealing: Test with a small sample. It is possible that a sealant can be used on Jura Grey however excessive attempts at sealing it could actually create a residue film build-up.
Block Sizes: These are quarries yielding selectable, grades of limestone with blocks suitable for gangsaw size down to economical tile-sized blocks. For commercial projects it is important to ensure that blocks are selected from the same quarry face.
Rough blocks are usually exported by Break Bulk however intermodal containerisation is available at extra cost. Finished products are packed into sea-worthy wooden crates and loaded into containers.
Quarry Location: Jura limestone is quarried near Eichstätt, Gundelsheim, Kaldorf, Moehren, Pappenheim, Rehlingen, Rothenstein, Solnhofen, Treuchtlingen, Weissenburg, Altmuehltal, Fraenkische Alb, Bayern, Germany. There are several different quarries of Jura limestones mostly varying in colour and size.
Synonyms: Altenbuerger, Altenbuerger Kalkstein, Altenbuerger Marmor, Eichstaetter Juramarmor, Eichstaetter Marmor, Fossilstone, Hampton, Jura, Jura Limestone, Jura Marble, Jura-Marmor, Jura Kalk, Jura-Kalk, Jurakalk, Juramarmor, Marbre Jurassique, Marmo Giurassico, Rehlinger, Rehlinger Jura Marmor, Rehlinger Kalkstein
Limestone: A sedimentary rock wholly or in large part composed of calcium carbonate. The primary source of the calcite is usually marine organisms, which settle out of the water column and are deposited on the ocean floors as pelagic ooze (but see lysocline for information on calcite dissolution). Secondary calcite may also be deposited in super-saturated meteoric waters, as is evidenced by the creation of stalagmites and stalactites. It is ordinarily white but may be coloured by impurities, iron oxide making it brown, yellow, or red and carbon making it blue, black, or grey. The texture varies from coarse to fine. Most limestones are formed by the deposition and consolidation of the skeletons of marine invertebrates; a few originate in chemical precipitation from solution. Limestone deposits are frequently of great thickness.
Mineral Composition: Average by %
Compression Tensile Strength: kg/cm2
Tensile Strength After Freeze-Thaw Cycles: kg/cm2
Unitary Modulus Of Bending Tensile Strength: kg/cm2
Heat Expansion Coefficient: mm/m°C
Water Imbibition Coefficient:
Impact Strength: cm
Frictional Wear: mm
Mass By Unit Of Volume: kg/m3
Hardness (Moh's Scale):
Note: These figures and details are given for guidance purposes only, no reliance should be taken as to their accuracy.