Olive Green Granite From Namibia | Colour Sample & Information | Eurasian
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Olive Green Granite : Namibia

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Olive Green Granite Image

Olive Green Granite

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Synonyms: Olive-Green, Olive Gruen, Oliver Green, Vert Olive

Location: Olive Green granite is quarried near Springbok, Northern Cape, Namibia.

Description: Olive Green granite is a medium-grained, grey-greenish gneiss/charnockite with black veining. There are two sorts available, cross cut and vein cut. This stone internationally may be nominated as a granite and in the area of application of the European Standard this stone must be nominated as a gneiss/charnockite.

The veining and colour varies and a small sample of Olive Green 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, Olive Green granite is frost free and polish constant.

Mineral Composition: Quartz, feldspar, biotite, pyroxene

Technical and Physical Characteristics:
Compression tensile strength: 2607 kg/cm2
Tensile strength after freeze-thaw cycles: 1973 kg/cm2
Unitary modulus of bending tensile strength: 134 kg/cm2
Water imbibition coefficient: 0.002300
Mass by unit of volume: 2751 kg/m3

Gneiss: A common and widely distributed type of rock formed by high-grade regional metamorphic processes from pre-existing formations that were originally either igneous or sedimentary rocks. Gneissic rocks are usually medium to coarse-foliated and largely recrystallized but do not carry large quantities of micas, chlorite or other platy minerals. Gneisses that are metamorphosed igneous rocks or their equivalent are termed granite gneisses, diorite gneisses, etc.

Charnockite: A hypersthene granite typical of Precambrian assemblages that contain migmatites. Charnockite is composed of orthoclase, oligoclase, quartz, and hypersthene; it also often includes the garnets almandine and pyrope, as well as biotite, magnetite, and other minerals. Two types of charnockites are distinguished: ferrohypersthene charnockite and garnet charnockite.

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