Your Trusted Silica Quartz Supplier From India


Silica Quartz

Size of quartz supplied:

We supply all the above quartz in the form of

  • Lumps: ( 25 –300 mm)
  • Chips: ( 15 –40 mm )
  • Grit Size as per customer requirement: ( 0 to 15 mm)
  • Powder: ( 100/200 Mesh)
  • Boulders: Big size (100 -300 mm)

Standard packing is available in 50 kgs.

HDPE bags in 1.2 mt or 1.35 mts Jumbo bags with or without liner inside, or as per customer requirements.

Potassium Feldspar (K-Feldspar)

Potassium Feldspar, commonly referred to as K-Feldspar, is a group of minerals distinguished by the presence of potassium. It is one of the most important ingredients in the formation of igneous rocks and a critical raw material in the manufacturing of glass, ceramics, and porcelain.


Chemical Composition: KAlSi3O8
Appearance : Typically pink, white, or occasionally shades of yellow and green
Mohs Hardness: 6-6.5
Specific Gravity: 2.55-2.63
Crystal System: Monoclinic or triclinic
Refractive Index: 1.518-1.526
Melting Point: 1100-1200°C

Elements Components
Silicon Dioxide (SiO2): 64.5-68.5%
Aluminum Oxide (Al2O3): 17.5-19.5%
Potassium Oxide (K2O): 10.5-13.5%
Sodium Oxide (Na2O): Up to 3%
Calcium Oxide (CaO): Trace amounts
  • Glass Industry: Enhances the strength and durability of the glass, reduces melting temperature.
  • Ceramics: Provides the vitreous or glassy matrix, enhances the strength and durability of the ceramic body.
  • Electronics: Used in the manufacture of certain types of semiconductors.
  • Abrasives: Utilized as a mild abrasive in polishing and grinding.
  • Improves hardness and durability of final products.
  • Enhances the aesthetic appeal with its ability to produce a glassy finish.
  • Lowers production costs by reducing the melting temperature of mixtures.

Potassium Feldspar (Grey)

Potassium Feldspar (Pink)

Pink Feldpar Chips

Potassium Feldspar Powder

Sodium Feldspar (Na-Feldspar)

Sodium Feldspar, or Na-Feldspar, is a group of aluminosilicate minerals containing sodium. It is widely used in various industries due to its high alumina and alkali content, making it a key component in the manufacture of glass and ceramics.


Chemical Composition: NaAlSi3O8
Appearance: Typically white, gray, or shades of red and blue
Mohs Hardness: 6-6.5
Specific Gravity: 2.61-2.64
Crystal System: Triclinic or monoclinic
Refractive Index: 1.533-1.539
Melting Point: 1100-1150°C

Elements Components
Silicon Dioxide (SiO2): 66.0-69.0%
Aluminum Oxide (Al2O3): 19.0-21.0%
Sodium Oxide (Na2O): 7.0-12.0%
Potassium Oxide (K2O): Up to 5%
Calcium Oxide (CaO): Trace amounts
  • Glass Manufacturing: Acts as a flux, lowering the melting point of the mixture and enhancing the strength and clarity of the glass.
  • Ceramics: Provides a necessary component for the vitreous phase, enhancing the mechanical strength and vitrification.
  • Fillers: Used in the production of paints, plastics, and rubbers to improve product quality and durability.
  • Enamels and Glazes: Enhances the gloss and smoothness of surfaces.
  • Improves hardness and durability of final products.
  • Enhances the aesthetic appeal with its ability to produce a glassy finish.
  • Lowers production costs by reducing the melting temperature of mixtures.

Sodium Feldpar Powder

Feldspar Uses

Potash feldspars are used primarily in clay bodies to promote vitrification, which is the process of turning the part of the body into glass. It melts at a slightly higher temperature (1200°C) than soda spar. Sodium feldspars are most commonly used in glazes. For your clay body, potassium feldspar is the king.

Most of the products we use on a daily basis are made with feldspar: glass for drinking, glass for protection, fiberglass for insulation, the floor tiles and shower basins in our bathrooms, and the tableware from which we eat.

Product Description

Potassium Feldspar Lumps: The name Feldspar refers to a group of aluminum silicates containing potassium, sodium, and calcium.
The chief use of Feldspar is in the ceramic tiles, sanitary ware, pottery, insulators, ceramic frit, and glass industries.
Smaller quantities are used in other industries.
Potassium feldspar melts at around 1200 °C (higher than soda feldspar), producinga more viscous melt than sodium feldspar.
It can also produce a crystalline phase (leucite) that contributes to opacity.
Thus, in industry, potash feldspars areoften used more for matte glazes, while soda feldspar is used for glossy glazes.
Potash feldspar, or potassium feldspar, find applications as low-cost fluxing agent in the production of ceramic items, i.e. compounding of tiles, sanitary wares, tableware, insulation, and glazes.
Potassium feldspar / Potash feldspar is used in glass-production,where it supplies the aluminum which enhances the strength and transparency of hollow glass, flat glass and glass wool.
Potash feldspar or Potassium feldspar, is used as filler in paints,plasters, insulation, etc.

Enamel frits and glazes: Feldspar assists the enamel composition, assuring the absence of defects and the neatness of the end product: e.g. enamel frit, ceramic glazes, ceramic tile glazes, sanitary ware, tableware, electrical porcelain and gift ware.
Potash feldspar find applications in paint, mild abrasives, urethane, welding electrodes (for the production of steel), latex foam, the welding rod coating, & road aggregate.

Silica Sand for the Ceramics Industry

Rahul Overseas is dedicated to providing high-quality raw materials for various industries. One of our primary products is silica sand, a crucial component in the ceramics industry. With its purity, consistency, and superior properties, our silica sand is perfect for manufacturing high-quality ceramic products.

Why Silica Sand?

Silica sand, also known as quartz sand, is a naturally occurring granular material composed primarily of quartz. It is renowned for its high silica content and exceptional physical and chemical properties, making it an indispensable material in the ceramics industry. Here’s why silica sand is highly valued in ceramics:


High purity levels are critical for ceramic applications. Impurities can affect the color and strength of ceramic products. Our silica sand boasts high levels of SiO2, ensuring minimal impurities.

Particle Size Distribution:

The consistency of particle size is vital in ceramics. Uniform particle sizes ensure smooth and uniform surfaces on ceramic products. Our silica sand is carefully processed to achieve optimal particle size distribution.

Thermal Stability:

Ceramics require materials that can withstand high temperatures. Silica sand has excellent thermal stability, maintaining its properties even under extreme heat, which is crucial during the firing process of ceramics.

Chemical Inertness:

The chemical inertness of silica sand ensures that it does not react with other raw materials in the ceramic mixture. This inertness helps in maintaining the integrity and quality of the final ceramic product.

Applications in Ceramics

Silica sand is used in various stages of ceramic production:

Body Composition: It is a key component in the formulation of ceramic bodies, providing the necessary silica content to achieve the desired physical properties.

Glaze and Frits: Silica sand is an essential ingredient in the preparation of glazes and frits. It helps in achieving the required gloss and finish on ceramic surfaces.

Moulding Sands: In the production of ceramic moulds, silica sand is used due to its refractory properties and ability to produce precise and durable moulds.

Why Choose Rahul Overseas?

At Rahul Overseas, we understand the critical role of silica sand in the ceramics industry. Here’s why our silica sand stands out:

Quality Assurance:

Our silica sand undergoes rigorous quality checks to ensure it meets the highest industry standards.

Consistent Supply:

We ensure a steady and reliable supply of silica sand, helping our clients maintain uninterrupted production

Custom Solutions:

We offer customized silica sand solutions to meet the specific requirements of different ceramic applications.

Sustainable Practices:

Our commitment to sustainable mining and processing practices ensures that our products are environmentally friendly.


Rahul Overseas is your trusted partner for high-quality silica sand tailored for the ceramics industry. With our commitment to quality, consistency, and customer satisfaction, we help you achieve the best results in your ceramic products. Contact us today to learn more about how our silica sand can benefit your ceramic production process.

Physical Properties

Particle Size Distribution: Tailored to customer specifications, typically between 45 microns to 150 microns.
Moisture Content: < 0.5%
pH Value: 7 (neutral)
Specific Gravity: 2.65
Bulk Density: 1.55 g/cm³

Advantages of Our Silica Sand
  • High Purity: Ensures the integrity and quality of ceramic products by minimizing the presence of impurities.
  • Optimal Particle Size Distribution: Provides a smooth finish and enhances the mechanical properties of ceramic bodies.
  • Excellent Thermal Stability: Maintains performance even at high firing temperatures, crucial for ceramic manufacturing.
  • Chemical Inertness: Prevents unwanted reactions during the ceramic production process, preserving the desired characteristics of the final product.
  • Consistent Quality: Each batch undergoes stringent quality control to ensure consistent performance, batch after batch.
Elements Composition
Silicon Dioxide (SiO2): 99.5% min
Aluminum Oxide (Al2O3): 0.2% max
Iron Oxide (Fe2O3): 0.05% max
Titanium Dioxide (TiO2): 0.02% max
Calcium Oxide (CaO): 0.03% max
Magnesium Oxide (MgO): 0.01% max
Sodium Oxide (Na2O): 0.03% max
Potassium Oxide (K2O): 0.01% max
Loss on Ignition (LOI): 0.1% max
Applications in Ceramics
  • Body Composition: Integral in formulating the ceramic body, contributing to the strength and durability of the final product.
  • Glazes and Frits: Essential for creating high-quality glazes that provide a smooth and glossy finish.
  • Moulding Sands: Used in the creation of ceramic molds due to its refractory properties and precision.
Commitment to Quality:

Rahul Overseas is committed to providing silica sand that meets the highest industry standards. Our rigorous quality control processes ensure that each batch of silica sand is consistent, reliable, and perfectly suited for the ceramics industry.

Silica Sand for Solar panel

Silica sand, known for its purity and exceptional properties, plays a vital role in the manufacturing of solar panels. As a primary raw material, silica sand contributes to the production of photovoltaic (PV) cells, the building blocks of solar energy conversion. At Rahul Overseas, we provide high-quality silica sand tailored to meet the stringent requirements of the solar panel industry.


Chemical Composition:

Our silica sand boasts a high purity level, typically containing over 99% silica dioxide (SiO2), ensuring optimal performance and reliability in solar panel manufacturing.

Particle size distribution :

We offer silica sand with controlled particle size distribution, ranging from fine powders to coarse grains, to meet specific processing and formulation requirements in solar cell production.


Our silica sand is meticulously processed to minimize impurities such as iron oxide, aluminum oxide, and other trace elements, ensuring the highest level of material purity and performance in solar panel applications.

Moisture Content:

We maintain low moisture content in our silica sand products to prevent potential issues during processing and to ensure consistent quality and performance in solar panel manufacturing.

Bulk Density:

Our silica sand is characterized by its uniform bulk density, facilitating efficient handling, transportation, and integration into solar panel production processes.

PV Cell Production:

Silica sand constitutes a significant portion of the materials used in the production of PV cells, typically accounting for approximately 70% to 80% of the total composition. The high purity and consistency of our silica sand ensure the reliable performance and efficiency of PV cells, enabling the conversion of sunlight into electricity with minimal losses.

Solar Panels / Solar Tubes Manufacturing

Silica quartz plays a crucial role in the manufacturing of solar panels and solar tubes. Its high purity and excellent optical properties make it an ideal material for producing photovoltaic cells, which convert sunlight into electricity. Silica quartz is used as a semiconductor material in the production of solar cells due to its ability to absorb and transmit sunlight efficiently, thereby enhancing the performance and durability of solar panels.

Elements Composition
Silicon Dioxide (SiO2): ≥ 99.5% - 99.99%
Alumina (Al2O3): ≤ 0.1%
Iron Oxide (Fe2O3): ≤ 0.05%
Titanium Dioxide (TiO2): ≤ 0.02%
Sodium Oxide (Na2O): ≤ 0.02%
Potassium Oxide (K2O): ≤ 0.02%
Magnesium Oxide (MgO): ≤ 0.02%
Calcium Oxide (CaO): ≤ 0.02%
Detailed Specifications
  • High purity silica quartz with minimal impurities to ensure optimal performance.
  •  Controlled particle size distribution for uniformity and consistency in solar cell manufacturing.
  • Exceptional optical transparency and light absorption properties.
  • Low thermal expansion coefficient to withstand temperature variations in solar panel applications.
  • Consistent electrical properties for efficient energy conversion.

Crucibles Manufacturing

Silica quartz is extensively used in the manufacturing of crucibles, which are essential containers for melting and processing metals and other materials at high temperatures. Its high melting point, thermal stability, and resistance to chemical corrosion make it an ideal material for crucible production across various industries, including metallurgy, ceramics, and semiconductor manufacturing.

Elements Composition
Silicon Dioxide (SiO2): ≥ 99.5% - 99.99%
Alumina (Al2O3): ≤ 0.2%
Iron Oxide (Fe2O3): ≤ 0.05%
Sodium Oxide (Na2O): ≤ 0.02%
Potassium Oxide (K2O): ≤ 0.02%
Magnesium Oxide (MgO): ≤ 0.02%
Calcium Oxide (CaO): ≤ 0.02%
Detailed Specifications
  • High purity silica quartz with minimal impurities to prevent contamination of molten materials.
  • High thermal shock resistance to withstand rapid temperature changes during metal melting processes.
  • Excellent chemical inertness to prevent reactions with molten metals and other substances.
  • Controlled porosity and density for optimal crucible performance and durability.
  • Consistent dimensional stability to maintain shape and integrity at high temperatures.

Semiconductor Manufacturing

Silica quartz plays a critical role in semiconductor manufacturing processes as a key component in the production of silicon wafers. Silicon wafers are used as substrates for fabricating integrated circuits and other semiconductor devices. The high purity and controlled crystal structure of silica quartz ensure the reliability and performance of semiconductor components in electronic devices.

Elements Composition
Silicon Dioxide (SiO2): ≥ 99.5% - 99.98%
Alumina (Al2O3): ≤ 0.1%
Iron Oxide (Fe2O3): ≤ 0.02%
Sodium Oxide (Na2O): ≤ 0.01%
Potassium Oxide (K2O): ≤ 0.01%
Boron Oxide (B2O3): ≤ 0.01%
Phosphorus Pentoxide (P2O5): ≤ 0.01%
Detailed Specifications
  • Ultra-high purity silica quartz with minimal impurities to meet stringent semiconductor manufacturing standards.
  • Consistent crystal structure and surface quality for uniformity and reliability in silicon wafer production.
  • Low levels of dopants and defects to ensure optimal electrical properties and device performance.
  • Precise dimensional control for wafer thickness and flatness requirements.
  • Excellent thermal conductivity and stability for efficient heat dissipation and device reliability.

Glass Industries

Silica quartz is a fundamental raw material in the glass industry, serving as the primary component in the production of various types of glass, including soda-lime glass, borosilicate glass, and fused silica glass. Its high purity, clarity, and thermal stability make it indispensable for manufacturing glass products used in construction, automotive, packaging, and consumer electronics.

Elements Composition
Silicon Dioxide (SiO2): ≥ 99.5% - 99.98%
Alumina (Al2O3): ≤ 0.15%
Iron Oxide (Fe2O3): ≤ 0.05%
Sodium Oxide (Na2O): ≤ 0.02%
Potassium Oxide (K2O): ≤ 0.02%
Calcium Oxide (CaO): ≤ 0.02%
Magnesium Oxide (MgO): ≤ 0.02%
Detailed Specifications
  • High purity silica quartz with minimal impurities to ensure optical clarity and chemical stability in glass production.
  • Controlled particle size distribution for consistent glass composition and properties.
  • Exceptional thermal shock resistance to withstand rapid temperature changes during glass forming processes.
  • Low coefficient of expansion to prevent glass distortion and breakage.
  • Tailored formulations for specific glass types and applications, such as clear glass, colored glass, and specialty glass products.

Optical Fiber Industries

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Silica quartz is the backbone of the optical fiber industry, serving as the core material for manufacturing optical fibers used in telecommunications, data transmission, and fiber optic sensing applications. Its exceptional optical transparency, low attenuation, and mechanical strength make it the preferred material for transmitting light signals over long distances with minimal signal loss.

Elements Composition
Silicon Dioxide (SiO2): ≥ 99.5% - 99.98%
Alumina (Al2O3): ≤ 0.1%
Iron Oxide (Fe2O3): ≤ 0.02%
Sodium Oxide (Na2O): ≤ 0.02%
Potassium Oxide (K2O): ≤ 0.02%
Boron Oxide (B2O3): ≤ 0.02%
Phosphorus Pentoxide (P2O5): ≤ 0.02%
Detailed Specification
  • Ultra-pure silica quartz with minimal impurities to ensure low optical attenuation and signal loss in optical fibers.
  • Controlled refractive index and dispersion characteristics for efficient light propagation and signal transmission.
  • High tensile strength and flexibility for ease of handling and installation in optical networks.
  • Uniform fiber geometry and diameter for consistent performance and compatibility with optical connectors and equipment.
  • Enhanced resistance to environmental factors such as moisture, temperature fluctuations, and mechanical stress.

Fumed Silica

Elements Composition
Silicon Dioxide (SiO₂) 99.8% minimum
Aluminum Oxide (Al₂O₃) 0.05% maximum
Iron Oxide (Fe₂O₃) 0.003% maximum
Loss on Ignition (LOI) 1.5% maximum

Fumed silica, also known as pyrogenic silica, is widely used in the paint industry for several key reasons:

1. *Rheology Control*: Fumed silica is used as a thixotropic agent to control the viscosity and flow properties of paint. This helps in preventing sagging and dripping during application, ensuring a smooth finish.

2. *Anti-Settling Agent*: It helps in keeping the pigments and other solid components uniformly dispersed within the paint. This prevents the components from settling at the bottom of the container, which is crucial for maintaining consistent quality and ease of application.

3. *Improved Stability*: Fumed silica enhances the stability of the paint formulation, increasing its shelf life by preventing the separation of components.

4. *Enhanced Mechanical Properties*: It improves the mechanical properties of the paint film, such as hardness, scratch resistance, and durability. This makes the paint more resistant to wear and tear.

5. *Matting Agent*: Fumed silica can be used to achieve a matte finish in paints and coatings by diffusing light and reducing gloss.

6. *Anti-Sagging*: In thick coatings, especially vertical surfaces, fumed silica helps in preventing the paint from sagging or running.

7. *Improved Surface Properties*: It can enhance the surface properties of the paint, such as smoothness and uniformity, contributing to a better aesthetic finish.

Overall, fumed silica is a versatile additive that improves the performance, application, and durability of paints and coatings, making it an essential component in the paint industry.

Elements Composition
Appearance White, fluffy powder
Surface Area (BET) 200 ± 25 m²/g
Particle Size 7-40 nm (primary particle size)
Bulk Density 30-60 g/L (tapped)
pH (in 4% dispersion) 3.7 - 4.5

Moisture Content :
As Shipped : 0.5% maximum

Loss on Drying :
At 105°C : 0.5% maximum

Applications :
Thixotropic agent in paints, coatings, and adhesives
Anti-settling agent in various formulations
Reinforcement in silicone rubber and other composites
Free-flow aid in powders and granulated products
Matting agent for reducing gloss

Packaging :
Typically available in 10 kg and 20 kg bags, or customized packaging as per requirement

Storage :
Should be stored in a cool, dry place away from moisture. Keep the container tightly closed when not in use.

These specifications are a general guideline and can vary slightly depending on the manufacturer. Always refer to the product’s technical data sheet provided by the supplier for precise information.