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What is Quartz Silica

Quartz is the most abundant and most common mineral on the Earth. It is found in almost every geological environment and also it is at least a component of almost every rock type. It has a hexagonal crystal structure and is made of trigonal crystallized silica. It is most varied in terms of varieties, colors and forms.
The most important distinction between the types of quartz is that one is of macrocrystalline, which is individual crystal visible to the unaided eye, and the other is microcrystalline or cryptodrystalline varieties, aggregates of crysstals visible only under high magnification. Chalcedony is the generic term for cryptocrystalline quartz. The transparent variety tends to be macrocrystalline and the cryptocrystalline varieties are either translucent or mostly opaque.

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    Product Description

    Quartz, most common of all minerals is composed of silicon dioxide, or silica, SiO2. It is an essential component of igneous and metamorphic rocks. The size varies from specimens weighing a metric ton to minute particles that sparkle in rock surfaces. The luster in some specimens is vitreous; in others it is greasy or glossy.

    Some specimens are transparent; others are translucent. In pure form, quartz is colorless, but it is commonly colored by impurities. Rock crystal is a colorless form of quartz occurring in distinct crystals. Rose quartz is coarsely crystalline and colored rose red or pink. Smoky quartz occurs in crystals ranging from smoky yellow to dark brown. Amethyst, a semiprecious variety of quartz, is purple or violet.

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    Chemical Properties

    S.No Parameters Percentage
    1 Silica (SiO2) 98% – 99.7%
    2 LOI 0.5 – 2%
    3 Whiteness 88% – 97%
    4 Mesh Up to 10 Micron at D80
    5 Fe₂O₃ 0.04% – 1%

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    Physical Properties

    • Color Clear (in pure form)
    • Crystal habit 6-sided prism ending in the 6-sided pyramid
    • Crystal system Trigonalopen
    • Cleavage None
    • Mohs scale hardness 7 – lower in impure varieties
    • Solubility H2O insoluble

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    Quartz Silica Sand Uses

    Quartz is used in various Industries as a Main Product and also as filler. Following are the Industries where it is used:

    • Glass – Quartz is the main component for producing Glass.
    • Ceramic – Used In Glazing.
    • Engineering Stone / Counter tops / Quartz Stone – Main Component and Filler.
    • Steel – Used in Furnace.
    • Paints – Used as Filler.
    • Water Purification – Water is passed through Quartz Wall.

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    Health and Safety

    The International Programme on Chemical Safety (IPCS), established in 1980, is a joint venture of the United Nations Environment Programme (UNEP), the International Labour Organization (ILO), and the World Health Organization (WHO). The overall objectives of the IPCS are to establish the scientific basis for assessment of the risk to human health and the environment from exposure to chemicals, through international peer review processes, as a prerequisite for the promotion of chemical safety, and to provide technical assistance in strengthening national capacities for the sound management of chemicals.


Metal Industries

Quartz granules are used during the raw iron production as builder of slag in the blast furnace process and quartz is also used as protective coating in the steel gutters and in the blast furnace process. Industrial sand is an essential part of the ferrous and non-ferrous foundry industry.

Paint & Coating Industry

High Purity Silica Powder is used in paint industry & coating for the purpose of Wood Finish, Primers, Undercoat, Water based paints, Distemper, Chemical resistance Coating, Floor Coating, Epoxy coating etc. Further, silica is also used in the construction chemicals as well as recommended for texture coating & exterior finishing

Refractory Industry

Quartz is use in the manufacture of acid silica bricks as it was high refractoriness. Refractoriness lowered by the presence of fluxes such as lime, iron oxide, magnesia and alkalies. The purity of raw material i.e., the high silica content is essential with least possible Al2O3.The presence of 0.01% Al2O3 lowers the refractoriness of silica.