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. |
Braun Antico, Marrom Antik, Angola Brown |
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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 | Anorthosite (Plutonite) |
Age | 1.5 Billion years (Pre-Cambrian) |
Colouring minerals: | Dark brown Feldspar |
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 | Angola |
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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Popular and typical usage
Petrology:Anorthosite consists almost exclusively of Calcium rich Plagioclase Feldspar. A very coarse crystalline structure, with large dark brown crystals (upto 10cm) and fine hairline cooling cracks. Feldspar has a scratch resistance similar to steel.
Petrogenesis:Liquefied rocks rich in Calcium and containing Silicates cooled slowly in the earth’s crust, forming large crystals. Extreme pressure and displacement caused tearing and rupturing, evidenced by the visible hairline cracks that permeate the stone right through. This has no bearing on the technical properties of the material as over millions of years the stone has unified as a mineral.
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