An element, or chemical element, is a pure substance which cannot be broken down by chemical processes into simpler substances. As of this writing, there are 118 known elements: About 80 percent of them occur naturally on Earth and the other 20 percent are called synthetic (or artificial) elements, because they are only produced in the laboratory. Helium is the most abundant element in the universe, and oxygen is the most abundant element in Earth’s crust.
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A mineral is a solid formed by natural processes that has a crystalline structure — a unique arrangement of atoms — and a defined chemical composition. Minerals are the basic geological building blocks of the solid earth. They combine in different ways to make many types of rocks.
A rock is a naturally occurring aggregate of one or more minerals. The minerals in every rock help tell the story of how that rock was made. The key factors involved in the formation of many rocks are the chemical elements involved, and the temperatures and pressures they experienced when the rock is being formed. Rocks make up the Earth’s crust and most of its interior. The three main classes of rocks are igneous, sedimentary, and metamorphic.
In general, a gemstone (or gem) is a piece of mineral cut and polished by a gem cutter, or lapidary, and then used for human adornment as jewelry. There are exceptions: Some biological materials, such as amber and pearls, are also used as jewelry, as are some rocks, such as lapis lazuli. Minerals valued for their qualities of color, clarity, beauty, durability, and rarity may be suitable for fashioning into gemstones ready to be set into jewelry. Gems have facets, which are the sides or edges that have been cut, shaped, and polished. Gems may also be cut and polished into cabochons, which are rounded on top with flat bottoms.
Quartz is one of the most widely used gem materials. Gems are cut from the many varieties of quartz: amethyst, citrine, rose quartz, smoky quartz, aventurine, agate, jasper, onyx, tiger’s eyes, and others.
Quartz is a hard, crystalline mineral composed of silicon and oxygen atoms (silica dioxide). It is basically one of the most famous and the second most abundant mineral with many uses found on earth. It is a major component of rocks (igneous, metamorphic and sedimentary rocks) and forms in all temperatures. Quartz in its purest form is clear or white in color but different impurities within the atomic lattice can cause the color to change to purple, pink, brown, black, gray, green, orange, yellow, blue, or red and in some cases, multi-color. There are various varieties of quartz with different uses. The following are the major properties of quartz which makes it one of the most useful naturally occurring minerals.
Therefore, due to its abundance, crystalline nature, high thermal, and chemical properties, quartz is employed in many large scale applications.
For centuries, quartz has been used in jewelry production and as gemstones. The hard, polishable, crystalline and durable nature of quartz make it an excellent material for this purpose. The varieties of quartz popularly used as jewelry and gemstones include Citrine, Amethyst, Ametrine, rose quartz, Aventurine, and Opal. Quartz with microcrystalline (cryptocrystalline) structures like Agate and Jasper is also used as gemstones.
Glassmaking is one of the primary uses of quartz. Glass is manufactured from a chemical compound known as Silica dioxide (SiO2) (a colorless crystalline compound found as quartz, sand or flint). This silica dioxide (which must be 99.9% exceptionally pure) is melted and allowed to cool down into whichever shape or dimension desired. Optical-based quartz crystals are used in the manufacture of lasers, microscopes, telescopes, electronic sensors, and scientific instruments.
In India, almost half of the quartz consumption is in the glass industry. Quartz sand is commonly used in the Indian glass industry for making container glass, flat glass, plate glass, specialty glass, fiberglass, bottles, table glassware, and other glassware. Quartz supplying industries such as Unique Crystal minerals LLP supply a large amount of quartz sand which is widely used in the Indian Glassmaking Industry.
Quartz crystals contain oscillators that possess the ability to vibrate at precise frequencies that helps to regulate the movement of the watch or clock, thereby making them accurate timepieces. Quartz crystals possess the piezoelectric effect (the ability to produce electricity when subjected to mechanical stress) which is also used to keep a tab on time.
Quartz sand is often blended with cohesive agents such as clay, resin sodium silicate, and oil, and used for the purpose of molding and metal casting. The properties of quartz sand such as high melting point, high strength and refractoriness help in the process of metal casting. Also, microcrystalline quartz is used to smoothen out crude edges on metals after they are cut, cast or drilled.
In the metal casting industry, Quartz sand is also added to molten metals for the process of removing impurities, mostly oxygen. The sand gets bonded with the impurities and is then easily removed.
Quartz sand is used in the production of refractory bricks because of its sheer strength and resistance to heat. It is also used as a flux to smelt out crude edges on metals after they have been cast, cut or drilled.
Due to its hardness (it is harder than most natural minerals), and resistance to corrosion, quartz sand is considered a wonderful abrasive. Also, it is used for sandblasting, glass grinding media, scouring cleansers (powder), and sanding and sawing grit.
Silica sand, alongside water and other chemicals under high pressure, is forced down into a bedrock formation via a well. The high pressure fractures the bedrock, the silica sand injects into the fractures and holds it in place, creating a passage for the flow of natural gas from the bedrock formation into the well. This process is known as hydraulic fracturing.
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Engineered quartz stones, which are industrially made from raw quartz, are popularly used as countertops and slabs in residential and commercial buildings.
Certain characteristics of engineered quartz stones distinguish them from natural stones such as granite and marble. The non-porous property of quartz makes it resist retaining stains. Hence, quartz countertops are easy to clean, does not retain stain, attractive, and luxurious.
Novaculite, a form of cryptocrystalline or microcrystalline quartz, is used in making medical incision devices, cutting weapons, and sharpening cutting tools for thousands of years even up to this day. Hones are used to sharpen razor, while whetstone or smooth stone is used to sharpen the edges of tools and knives.
Laboratory Crucibles are the containers that are used for holding chemicals when chemical or thermal tests are performed. Quartz has a very high melting point and is chemically inert, and so, is employed into making quartz crucibles that are used in the laboratories for performing chemical reactions and tests. The advantages quartz crucibles offer includes low expansion, thermal shock resistance, and excellent dimensional stability. Fused Quartz made from quartz granules is generally used in making such vessels.
Just like in the production of wristwatches and clocks, quartz crystals are also used in electronics because it generates current on its surface when bent or compressed. Quartz crystals have been used for years to give an accurate frequency for all radio transmitters, radio receivers, GPS transmitters, and computers. This accuracy comes from the fact that quartz crystal is unaffected by most solvents, and remains crystalline to hundreds of degrees Fahrenheit.
Quartz sand and ground quartz (quartz in powder state) are used as filler in the manufacture of adhesives, putty, paint, and rubber. This powder provides properties such as durability, chemical inertness, strength, and wear-resistance.
Quartz sand is used in the manufacture of traction in railroad and mining industries due to its durability and large grains so as to minimize fracture. It is also used in the recreation of golf courses, volleyball courts, baseball fields, children’s sandbox, and beaches.
Quartz sand is used in the ceramic industry for making ceramic tiles. The silica present in the sand helps in providing white color to the ceramic ware and helps in making the ceramic body.
Also known as rottenstone, it is high-quality crystalline silica usually in powder form. It is used to polish the jewelry, buff out stains from wood, as a filler, in plastics, paint, and rubber, and in toothpaste and soap production. Tripoli particles are rounded rather than sharp, thus, it is considered a mild abrasive.
Synthetic crystals are grown in laboratories. They are artificially produced from dissolving raw silicon diode(SiO2) in an alkali water solution at a high temperature. Although this process is slow, it provides high purity and generally high-quality crystals that are almost as good as the naturally found quartz crystals. Synthetic quartz crystals are resistant to acids, corrosion, high temperatures, wear, impact, compression, bending and infiltration.
Synthetic crystals are employed in the electronics industry, semiconductor and the solar industry, photomasks, and even lithographic tools.
Quartz possesses certain physical, chemical and electric properties that make it highly usable in a wide range of industries and sectors. From Jewelry making and gemstones, for its ability to luster, to brick making in the refractory industry for its physical strength and to watches and clocks for its piezoelectric property, quartz find uses in a wide range of industries.
In India, Quartz is mainly consumed in the glass and cement industry, followed by Ferro-alloys, Iron & Steel and Foundry Industry.
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