Basaltlava
Basaltlava is basalt where many open pores are formed by gas formation. Characteristics
Basaltlava is a very porous stone, with an irregular fracture surface that feels rough and sharp. Because the stone is also very rough in working conditions, it is widely used for floors and especially stairs, especially because the surface is also wet in its wet condition. Furthermore, basaltlava is not worth mentioning: the stone is very frost resistant and resistant to acids. At the top there will be algae formation or mosaic growth in wet situations, and the stone will become darker in the course of the centuries until grayish. Applications
The material has been used for the milling of mills for centuries, until a synthetic replacement was introduced in the 20s of the 20th century. Due to its excellent wear and tear resistance, Basaltlava is also used for the restoration of monuments, for example for stairs, balustrades or for replacement of vulnerable parts such as spiders and pinnacles. In the 1980s, so many parts of St. John's Cathedral in 's-Hertogenbosch were replaced in basaltlava, as an alternative to sandstone, because of the ban on the use of sandstone in 1951. In 1993, Volvic basaltlava was applied to the Our Ladybug in Amersfoort, where it fits perfectly with the original sandstone parts. Basaltlava is also used as the basis for weatherproof tiling.
Examples of this stone are
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