Raw Silk Granite
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Synonyms: Indian Juparana Ivory, Ivory Orange, Orange Ivory, Rare Ivory, Rohseide, Row Silk, Seta Cruda
Location: Raw Silk granite is quarried near Melur, Madurai, Tamil Nadu, India. There are two distinct types available, Pink or Cream/Ivory.
Description: Raw Silk granite is a grey-pink, or cream/ivery, soft banded gneiss. 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.
The veining and colour varies and a small sample of Raw Silk 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, Raw Silk granite is frost free and polish constant.
Technical and Physical Characteristics:
Compression tensile strength: 1776 kg/cm2
Tensile strength after freeze-thaw cycles: 1610 kg/cm2
Unitary modulus of bending tensile strength: 152 kg/cm2
Water imbibition coefficient: 0.002300
Mass by unit of volume: 2583 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.