Nero Marquina Limestone
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Synonyms: Black Marquina, Black Marquinia, Marquina, Marquinia, Marquinia Marble, Negro Bilbao, Negro Markina, Negro Marqina, Negro Marquina, Negro Marquino, Nero Bilbao, Nero Maraquina, Nero Marqina, Nero Marquina, Nero Marquina Venato, Nero Marquine, Nero Marquinia, Noir Marquina, Prete Marquinia, Preto Marquina, Spanisch Schwarz, Spanish Black
Location: Nero Marquina limestone is quarried near Aulestia, Marquina, Markina, Vizcaya, Pais Vasco, Spain.
Description: Nero Marquina Limestone is a commercial name for a black limestone of the Carboniferous period with white calcite veins and fossil fragments (rudistes and corals). 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.
A small sample of Nero Marquina limestone is not representative owing to a variation in veining. Swatch samples must be approved for large projects to ensure that the blocks are all extracted from the same quarry face for matching purposes. Nero Marquina limestone is ideal for both interior and exterior use, frost resitant however polish is only constant inside.
The use of polished Nero Marquina limestone is not recommended for flooring tiles owing to high breakage rates. It is quite common for Nero Marquina random slabs to be strengthened with glass fibre netting and resin.
Mineral Composition: Average by %:
Limestone: A sedimentary rock, mainly composed of mineral calcite. 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.