Silver Cloud Granite From United States Of America
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Description: Silver Cloud granite is a fine-grained, grey to white-grey gneiss (paragneiss) of the Precambrian period with cloudy decoration, partly with pyrite and hematite. 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 gneiss. 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. Silver Cloud Granite is suitable for both interior and exterior use futhermore is frost resistant and with a constant polish.
The veining and colour varies considerably and a small sample of Silver Cloud 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, Silver Cloud granite is frost free and polish constant.
Products: Suitable for construction projects both commercial and domestic, prefabricated countertops/worktops, vanities, tiles, backsplashes, paving, fireplaces and memorials.
Surface Finish: Silver Cloud 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 Silver Cloud 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: Silver Cloud granite is quarried near Lithonia, Atlanta, Georgia, U.S.A. There is only one quarry of Silver Cloud granite, the veining is a marbling of grey and white and a small sample is not representative of the whole block or slabs.
Synonyms: Silver Cloude, Silver Clouds, Silver-Clowd.
Gneiss: A high grade metamorphic rock. Gneiss is medium to coarse-grained and may contain abundant quartz and feldspar, which some petrographers regard as essential components. The banding is usually due to the presence of differing proportions of minerals in the various bands; dark and light bands may alternate because of the separation of mafic (dark) and felsic (light) minerals. Banding can also be caused by differing grain sizes of the same minerals. The mineralogy of a particular gneiss is a result of the complex interaction of original rock composition, pressure and temperature of metamorphism, and the addition or loss of components.
Mineral Composition: Average Orthoclase: 62%, Quartz: 27%, Hornblende: 5%, Biotite: 3%, Plagioclase: 2%, Mafite: 1%.
Compression tensile strength: 2080 kg/cm2
Tensile strength after freeze-thaw cycles: 1990 kg/cm2
Unitary modulus of bending tensile strength: 132 kg/cm2
Heat expansion coefficient: 0.0065 mm/m°C
Water imbibition coefficient: 0.004000
Mass by unit of volume: 2620 kg/m3
Hardness (Moh's Scale):
Note: These figures and details are given for guidance purposes only, no reliance should be taken as to their accuracy.