Verde Tunas Green Granite
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Synonyms: Tunis Green
Location: Verde Tunas Green granite is quarried at quarry RN 000213, Barro Vermelho, Tunas do Parana, Parana, Brazil.
Description: Verde Tunas Green granite is a medium to coarse-grained, grey-green-brown syenite of the Cretaceous period. 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 a syenite.
The veining and colour varies and a small sample of Verde Tunas 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, Verde Tunas granite is frost free and polish constant.
Mineral Composition: Alcaline Feldspar: 80%, Pyroxene: 10%, Amphibole+Biotite: 5%, Accessories: 5%.
Technical and Physical Characteristics:
Bulk density: 2,664 kg/dm≥
Bending strength: 17,96 N/mm≤
Compression breaking load: 151,00 N/mm≤
Abrasion resistance: 0,50 mm
Water absorption: 0,29%
Syenite: A coarse-grained intrusive igneous rock of the same general composition as granite but with the quartz either absent or present in relatively small amounts (<5%). The feldspar component of syenite is predominantly alkaline in character (usually orthoclase). Plagioclase feldspars may be present in small quantities, less than 10%.