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Synonyms: Finlandia Blau Spektrolit, Finlandia Blue, Finnischer Labrador, Labradorfels, Spectrolit, Spectrolith, Spectrolite, Spektroliitti, Spektrolith, Spektrolyt, Spektrolyth
Location: Spectrolite granite is quarried at Nuijama, Ylaemaa, Finland, near the Russian border. Quarried since 1962. Rough blocks are classified in two categories: premium quality blocks and so called mass blocks. The so called mass blocks are not shaped and might have some colour and/or crack defects.
Description: Spectrolite granite is a very coarse-grained, non-foliated, dark blue-black anorthosite of the Precambrian period with individual, sparkling spectrolite crystals ranging from 5 to 50 mm in size. This stone internationally may be nominated as a granite but in the area of application of the European Standard this stone must be nominated as an anorthosite.
The veining and colour varies and a small sample of Spectrolite granite 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. Ideal for both interior and exterior use, Spectrolite granite is frost free and polish constant.
Mineral Composition: Plagioclase: 81%, Pyroxene: 10%, Quartz: 4%, Other: 5%
Technical and Physical Characteristics:
Density: 2780 kg/m3
Water absorption: 0.16 wt %
Compressive strength: 215 MPa
Flexural strength: 12.8 MPa
Hardness: 6.0 Mohs
Anorthosite: A phaneritic, intrusive igneous rock characterized by a predominance of plagioclase feldspar (90-100%), and a minimal mafic component (0-10%). Pyroxene, ilmenite, magnetite, and olivine are the mafic minerals most commonly present.