Bianco Romano Granite
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Synonyms: Bianca Romano, Bianco Roma, Bianco Romano Granite, Blanco Romano, Branco Romano
Location: Bianco Romano granite is quarried near RN 000159, Rodovia Br 259, km 02, Joao Neiva, Espirito Santo, Brazil
Description: Bianco Romano granite is a medium to coarse-grained, yellowish-white gneiss with only a few, big red garnets. 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 gneiss.
A small sample of Bianco Romano granite is usually not representative owing to a wide variation in colour and 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. Ideal for both interior and exterior.
Mineral Composition: Average by %: Microcline: 48%, Quartz: 30%, Oligoclase: 10%, Sillimanite: 5%, Garnet: 5%, Biotite: 2%
Gneiss: A high grade metamorphic rock. This means that gneiss has been subjected to more heat and pressure than schist. Gneiss is coarser than schist and has distinct banding. This banding has alternating layers that are composed of different minerals. The minerals that compose gneiss are the same as granite. Feldspar is the most important mineral that makes up gneiss along with mica and quartz. Gneiss can be formed from a sedimentary rock such as sandstone or shale, or it can be formed from the metamorphism of the igneouse rock grantite. Gneiss can be used by man as paving and building stone.