Verde Bitterfontein Granite From South Africa
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Description: Verde Bitterfontein granite is a coarse-grained, dark green granite of the Precambrian period, the colour is caused by chlorite. 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 granite however it is more likely that this is actually a charnockite. The veining and colour varies and a small sample of Verde Bitterfontein 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. During the polishing process a clear epoxy resin filler may be used to fill any micro fissures or tiny pitting however this does not affect the integrity of the stone, it merely provides an even smoother surface finish. Verde Bitterfontein Granite is suitable for both interior and exterior use futhermore is frost resistant and with a constant polish.
Products: Suitable for construction projects both commercial and domestic, prefabricated countertops/worktops, vanities, tiles, backsplashes, paving, fireplaces and memorials.
Premium Quality Slab Sizes 2 & 3cm
Standard Slab Sizes 2 & 3cm
Granite Countertops 2 & 3cm
Calibrated Tiles: Standard sizes available are:
305 x 305 x 10 mm (12" x 12" x 3/8")
More granite tile and production information.
Surface Finish: Verde Bitterfontein Granite looks best with a gloss polished surface but is also available as honed, leather/satin, river-washed/antique, thermal/flamed, brushed and sandblast finish.
Sealing: Test with a small sample. It is possible that a sealant can be used on Verde Bitterfontein granite however excessive attempts at sealing it could actually create a residue film build-up.
Block Sizes: This is a quarry yielding selectable, grades of granite with blocks suitable for gangsaw size down to economical tile-sized blocks. For commercial projects it is important to ensure that blocks are selected from the same quarry face.
Rough blocks are usually exported by Break Bulk however intermodal containerisation is available at extra cost. Finished products are packed into sea-worthy wooden crates and loaded into containers.
Quarry Location: Verde Bitterfontein granite is quarried near Garies, Northern Cape, South Africa. There are thought to be two Verde Bitterfontein quarries. Exported to Europe since 1975.
Synonyms: Bitterfontain, Bitterfontain SA, Bitterfontein, Bitterfontein Green, Fontain Green, Fontain Verde, Fontaine Green, Fontaine Verde, Fontein Green, Fountaine Green, Granit Verde Fontain, Green Fountain, Marlin Verde, Turmalin, Verde Bitterfontein, Verde Fontain, Verde Fontein, Verde Fountaine, Verdefontain, Verdefontein, Verdi Fontaine, WG202.
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. Charnockite was once thought to be igneous, but it is now known to be metamorphic since despite the high temperatures and pressures, the original protolith never actually melted.
Granite: A coarse or medium-grained intrusive igneous rock that is rich in quartz and feldspar; it is the most common plutonic rock of the Earth's crust, forming by the cooling of magma (silicate melt) at depth. The principal constituent of granite is feldspar. Both plagioclase feldspar and alkali feldspar are usually abundant in it, and their relative abundance has provided the basis for granite classifications. In most granite, the ratio of the dominant to the subdominant feldspar is less than two. Rocks containing less than 20 percent quartz are almost never named granite, and rocks containing more than 20 percent (by volume) of dark, or ferromagnesian, minerals are also seldom called granite. The minor essential minerals of granite may include muscovite, biotite, amphibole, or pyroxene. Biotite may occur in granite of any type and is usually present, though sometimes in very small amounts.
Mineral Composition: Average by % .
Bulk density: 2.73 - 2.76 kg/dm3
Bending strength: 12.95 - 20.8 N/mm2
Compression breaking load: 188.3 - 214.84 N/mm2
Water absorption: 0.11 - 0.14% weight
Hardness (Moh's Scale):
Note: These figures and details are given for guidance purposes only, no reliance should be taken as to their accuracy.