Synonyms Stones can have many aliases. This is due to language differences, supplier choice, coloquial trends or slang, or sometimes errors and ambiguity between rocks. Read more here. |
Finlandia Blue, Finnish Labrador |
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Category Commercial classification sometimes differs to the scientific, geological designation. In particular, some limestones are deemed marble especially if they take a high polish. Read more here. |
Granite |
Petrographic assignment | Plutonite |
Age | 900 million years (Precambrian) |
Colouring minerals: | Black-blue labradorite feldspar, grey-beige feldspar, black pyroxene |
Average hardness MOHS is the standard scale of hardness for minerals 1-10, with 10 being the MOHS of diamond. We also use the broad terms Hard and Soft for simplicity. Read more here. |
6-7 (Hard) |
Origin | Finland |
The images of each stone aim to give a faithful representation of the structure and colouring. The close-ups are generally taken from a sample around 100mm in height to get the detailing of the grain and crystals. The slab images are usually between 2000x1000mm and 3000x1900mm approximately, to give a more overall picture of the pattern.
This is for guidance only, when seeking a specific pattern and colour matching, please obtain a sample or arrange for the slab to be viewed in person. When placing the order, you may require a photo of the actual slab before production, the colour and character can vary significantly even throughout the same block within natural materials. Also monitor calibration, camera settings and lighting can all effect how the materials are perceived.
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Petrology:– a sub-group of the gabbro family, anorthosites are medium to large grain plutonic rocks and. They have a basic black-green shading and consist of labradorite-feldspar. The labradorite crystals of spectrolite show, due through sub-microscopic fine segregation lamella, shimmering light reflections in every colour of the spectrum – but predominantly blue.
Petrogenesis:– Anorthosites usually exist as bands, lenses and layers in large gabbro massifs. On the then Scandinavian Shield, during the Algonkian period (primeval ages), the anorthosite component separated from the gabbro magma through crystallisation over millions of years, then solidified as spectrolite with coarse crystals to giant grains.
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