Classic Black Granite From India
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Description: Classic Black Granite is an economical dark, medium-grained black basalt (dolerite) with equi-granular crystalline texture. 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 dolerite. 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. Classic Black 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.
Surface Finish: Classic Black 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. We never use colour enhancers.
Sealing: Test with a small sample. It is most unlikely that a sealant can be used on Classic Black granite due to the very tight grain formation, attempts at sealing it could actually create a residue film build-up.
Block Sizes: This is a very large black granite quarry yielding several, selectable, grades of granite with blocks suitable for gangsaw size down to economical tile-sized and monument blocks. Extraction commenced in the very early 70s. For commercial projects it is important to ensure that blocks are selected from the same quarry face, do not try and match-up with alternative black granite sources.
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: Classic Black granite is from our own sheet bedrock quarry near Warrangal, Andhra Pradesh, India.
Synonyms: Granito Nero Classico, Granite Noir Classique, Klassischer Schwarzer Granit, Granito Negro Clasico
Dolerite (Diabase, Microgabbro): A dark-coloured, medium-grained igneous rock which contains plagioclase feldspar of labradorite composition and pyroxene of augite or titanaugite composition as essential minerals, and magnetite, titano-magnetite, or ilmenite as accessory minerals. Where olivine also occurs as an additional mineral, the rock is termed an "olivine dolerite". Where quartz occurs as an additional mineral in the groundmass, the rock is termed a "quartz dolerite". Dolerites are the medium-grained equivalents of basalts and, like the basalts, can be divided into alkali and tholeiitic types. Dolerites are commonly found in shallow level intrusions such as dykes, sills, or plugs.
Mineral Composition: Average by %
Compressive Strength: 3011/kg cm2
After Freezing: 2636/kg cm2
Ultimate Tensile Strength: 280/kg cm2
Water Absorption: 0.00001
Volumetric Weight: 2989 kg/m3
Hardness (Moh's Scale): 6-7
Note: These figures and details are given for guidance purposes only, no reliance should be taken as to their accuracy.