Where Is Quartz Found? Top Countries, Deposits and 7 Uses

Quartz is found on every continent. It forms in igneous, metamorphic and sedimentary rocks at nearly all temperatures, so geology.com calls it the most abundant and widely distributed mineral at Earth’s surface. Finding quartz is easy. Finding quartz that is pure enough, or close enough to a buyer, to be worth mining is much harder, and that is what this page is about.

The short version by product: the largest listed producers of industrial silica sand in 2025 were the United States, China and the Netherlands; the United States was estimated to lead in high-purity quartz, from pegmatites around Spruce Pine, North Carolina; and most lascas, the raw crystal feed for cultured quartz, was mined in Brazil and Madagascar (USGS, 2026).

Where is quartz found in the world?

Quartz is silicon dioxide (SiO2). By mass it makes up about 12% of Earth’s lithosphere, the rigid outer shell, second only to the feldspar group at 41% (Wikipedia, Quartz). It is also very hard to destroy. It resists both chemical and physical weathering, which is why it stays behind when softer minerals break down. That one property explains why the sand on most of the world’s beaches is quartz, and why it is the main grain in river and desert sand too.

So the useful question is rarely “does this area have quartz?” It nearly always does. The useful questions are which type of quartz it is, how pure it is and how far it sits from a customer. The table below sorts the main sources by the product they supply.

Where quartz is most commonly found: the rock types

Five geological settings account for nearly all the quartz people see or mine. Each one gives a different product, so the setting is the first thing a buyer or licence holder should pin down.

Granite and other felsic igneous rocks

Quartz is a defining mineral of granite and similar light-colored igneous rocks (Wikipedia, Quartz). These rocks underlie large parts of the old continental shields and many mountain belts. As granite weathers, its quartz grains are released and carried away to form sand. The grains in an ordinary granite are usually too small and too locked up with other minerals to mine for quartz alone.

Pegmatites

A pegmatite is a very coarse-grained igneous rock, often formed in the last stage of a cooling granite body. Big crystals make the minerals easier to separate, which is why these rocks matter. At Spruce Pine, USGS reports that high-purity quartz comes from pegmatite mined at the same time for feldspar and mica. A 2010 University of Georgia and USGS study notes that only some plutons of the Spruce Pine suite give quartz that can be processed to ultra-high purity, a warning that a pegmatite alone proves little. Our guide to pegmatite deposits covers how these bodies are explored.

Hydrothermal veins

A vein forms when hot, silica-rich water moves through a fracture and leaves quartz behind as it cools. The Ouachita Mountains of Arkansas are a well-documented case. According to the Arkansas Geological Survey, most crystal deposits mined there are veins that filled cavities or fractures in the Crystal Mountain and Blakely sandstones. Single crystals up to 5 feet long and clusters weighing over 10 tons have come from those mines.

Veins matter to metal explorers as well. Many gold and silver deposits sit in quartz veins, though most quartz veins carry no payable metal. See the rock types that host gold and types of ore deposits for grade and tonnage examples.

Sand and sandstone

This is where most mined quartz by weight comes from. USGS says quartz-rich sand and sandstone, the main sources of industrial silica sand, occur throughout the world. Purity varies a great deal. The Oriskany Sandstone at Hancock, West Virginia, is over 99% quartz in a few locations (geology.com), good enough for glass.

Quartzite

Quartzite is sandstone that heat and pressure have recrystallized into a very hard rock. It is common in old mountain belts, and it is a source of silica for metal smelting. USGS says US ferrosilicon was sourced primarily from domestic quartzite.

▶ How gold is found and mined, a common reason explorers study quartz veins · 5:27

Where is quartz sand found? Top producing countries

Industrial sand is the only form of quartz with full world production figures from USGS. World output was about 430 million tonnes in 2025. The United States led with an estimated 120 million tonnes, followed by China at 92 million and the Netherlands at 68 million. Turkey, France and Italy follow with much smaller tonnages. USGS describes reserves simply as “large” and says these deposits are widespread. It also warns that definitive figures are hard to collect for most countries, because terminology and specifications differ, so treat the country ranks as approximate.

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US industrial sand sold or used

Million tonnes; 2025 is an estimate

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Selected producers of industrial sand and gravel

Million tonnes, 2025 estimates, selected countries

Inside the United States, 131 companies ran 207 operations in 38 states in 2025. Texas, Wisconsin, Oklahoma and Louisiana, in that order, supplied 77% of the total (USGS, 2026).

Australia is a smaller producer by USGS figures, at 5.6 million tonnes in 2025, but it is home to a long-running export mine. Cape Flattery Silica Mines in far north Queensland has operated since 1967, and in 2021 the Queensland Government said it exported more than 3 million tonnes a year.

US output has swung with well drilling, because frac sand dominates demand. Tonnage rose from 91 million tonnes in 2021 to 136 million in 2023, then eased to an estimated 120 million in 2025. The average value fell to about US$36 per tonne in 2025, from US$40.90 in 2024.

Where is high-purity quartz found?

High-purity quartz (HPQ) is natural quartz with less than 100 parts per million (ppm) of total impurities, which equals 99.99% silica. Ultra-high-purity grades may have 10 ppm or less (USGS). USGS publishes no world production or reserve table for it. It says only that reserves are limited to a few locations and that the United States was estimated to lead production, with other sources including Australia, Brazil, Canada, China and Russia. In April 2025, China’s Ministry of Natural Resources announced over 35 million tons of high-purity quartz reserves in Henan and Xinjiang, with first tests at 99.995% to 99.998% purity, against over 99.999% from Spruce Pine.

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High-purity quartz: range of value

US dollars per tonne, ground product, United States

Spruce Pine, North Carolina

Two companies produced HPQ around Spruce Pine in 2025, according to USGS. Sibelco runs mining, separation and processing sites there, with feldspar and mica as byproducts. The other is The Quartz Corp, which was formed in 2011 when Imerys and Norsk Mineral merged their quartz assets, and which bought the United States Gypsum facility at Spruce Pine in 2020 (company history).

The concentration became a supply concern in late 2024, when Hurricane Helene disrupted operations at Spruce Pine. Sibelco later announced it had restarted production and shipments. On June 30, 2026, The Quartz Corp said it was closing one Spruce Pine production facility, on Altapass Highway, indefinitely and cutting 20 to 30 jobs, citing losses in renewable energy markets; its other US locations were not affected.

Drag, Norway

Quartz mining at Drag began after the Geological Survey of Norway started exploring there in 1975, and The Quartz Corp activated a chlorination plant at the site in 2021 (company history). Norway also ranks among the larger producers of silicon metal outside China, with about 130,000 tonnes in 2025 (USGS, 2026).

What high-purity quartz sells for

The price range is very wide because grade drives value. USGS gives US$500 to US$12,000 per tonne for 2025, down at the top end from US$17,000 in 2024. Compare that with about US$36 per tonne for average US industrial sand. The difference is why purity testing, not tonnage, decides whether a quartz body has special value. Most quartz never reaches the high-purity market. It takes crushing, washing, sorting and then physical, chemical and thermal processing to get there, and USGS notes at least one US producer sent its product overseas for further processing.

Where is quartz crystal mined? Brazil, Madagascar and Arkansas

Lascas is the trade name for natural quartz chips and crystal used as the raw feed for growing cultured quartz. USGS says most lascas was mined in Brazil and Madagascar and that global lascas reserves are estimated to be large. Natural crystal good enough for direct electronic or optical use is limited, and dependence on it is expected to keep falling as cultured crystal takes its place.

Cultured crystal is manufactured, not mined. USGS estimates US prices in 2025 at about US$200 per kilogram for as-grown crystal and US$500 per kilogram for lumbered crystal, which has been cut to shape.

Arkansas is a well-known US specimen source, though USGS says US mining of natural quartz crystal for industry ended in 1997. The state survey says its crystals sell mostly to tourists, museums, schools and private collectors, and that top pieces may bring thousands of dollars. Clear “Herkimer diamond” crystals from New York are another collector favorite (geology.com). Neither market behaves like industrial quartz: value depends on each specimen rather than on tonnes.

Where gem quartz is found

Quartz varieties take their color from trace impurities, inclusions or natural radiation. The reference table in Wikipedia’s quartz article gives these occurrences:

• Amethyst (purple): Brazil, Mexico, Uruguay, Russia, France, Namibia and Morocco, often as large clusters and geodes.
• Citrine (yellow): natural citrine is rare, with Brazil named as a source. Most stones sold as citrine are heat-treated amethyst or smoky quartz.
• Ametrine (purple and yellow): Bolivia and Brazil, though much of what is sold has been treated.
• Rose quartz (pink): usually massive rather than in crystals; well-formed pink crystals are known from Minas Gerais, Brazil.
• Prasiolite (green): rare in nature, reported from Brazil, Thunder Bay in Canada and Poland. Most is heated amethyst.

For a small buyer, this means a color name tells you little about origin. Ask whether a stone is natural or treated, and treat “natural” as something to be shown by a gem lab rather than assumed. The International Gem Society has a value and variety guide.

Top 7 uses of quartz

The list follows the order of the main markets in USGS data, then the smaller specialist ones. The biggest uses by tonnage are low-priced sand, while the small high-purity market sells at far higher prices.

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Where US industrial sand goes

Share of tonnage, 2025

1. Hydraulic fracturing sand. In the US, about 81% of industrial sand went to frac sand and well packing and cementing in 2025. Hard, round grains hold rock fractures open so wells can flow.
2. Glass. About 7% of US tonnage, covering containers, flat glass and fiberglass. Glass sand must be low in iron, or the glass picks up color.
3. Fillers, foundry and filtration. Sand is used as a filler, for metal-casting molds and for water filtration. Together with recreational sand, these took another 7%.
4. Silicon metal and ferrosilicon. Quartz or quartzite is reduced in electric furnaces. World silicon metal output was about 4.6 million tonnes in 2025, of which China made about 4 million (USGS, 2026). Aluminum alloys and silicones are the main US uses.
5. Crucibles, chips, solar and fiber optics. HPQ is made into fused quartz crucibles, in which silicon ingots for wafers are grown, as well as lamp tubing and specialty glass.
6. Timekeeping and signal control. Quartz is piezoelectric, meaning it produces a voltage under stress. Crystal oscillators built on that effect control frequency in watches, radios, computers, phones and GPS equipment.
7. Gemstones and ornamental stone. Amethyst, citrine, rose quartz and aventurine are cut for jewelry and display.

▶ How satellites read the rock around a deposit, including altered ground and faults · 4:25

How to judge a quartz deposit before you buy or develop it

This section is for licence and claim owners, consultants and investors. Quartz is common, so a report that a property “has quartz” adds little on its own. The steps below are a general order of work, and they promise nothing about any one property.

1. Name the product. Decide whether the target is construction sand, glass sand, frac sand, smelter-grade lump, HPQ or specimens. Each has its own specification and its own buyers.
2. Map the geology and access. Record the host rock, size and shape of the body, overburden and road or rail access. If the licence is new, check its boundary against the cadastre first.
3. Sample and test purity. A silica percentage is not enough. Ask for trace elements in ppm from an independent lab, because HPQ limits depend on end use (USGS, 2026). Test the product after processing too, since that is what the buyer receives.
4. Run freight numbers early. At about US$36 per tonne on average, ordinary sand cannot carry long truck hauls. The calculator below shows how quickly transport eats the margin.
5. Talk to buyers. Ask for their written specification and a sample approval route. For HPQ, qualification can decide the project’s value.
6. Plan for dust. Respirable crystalline silica is a serious lung hazard. The US mine safety rule published in April 2024 sets an exposure limit of 50 micrograms per cubic meter over a full shift and an action level of 25. Check current compliance dates with MSHA, and your own regulator outside the US.

Budget for each of these before relying on any tonnage figure. A calculation is only as good as its tested yield and a real buyer’s price.

Can satellites map quartz?

Yes, within limits. Quartz has a clear response in thermal infrared light. A USGS study in southwestern Utah used ASTER thermal data to map quartz and carbonate minerals, alongside shorter-wave data for clay and other alteration minerals, across about 11,245 square kilometers. This works on exposed rock. Soil, plants and small veins narrower than a pixel limit what can be seen, and no satellite measures ppm-level purity. Lab tests still decide that.

For a licence holder, imagery is most useful as a screen: it shows where exposed silica-rich rock, alteration and structures line up, so field sampling starts in the right places. Farmonaut’s satellite-based mineral detection includes quartz among its industrial minerals, and results are exploration targets, not a resource estimate. To discuss a site, use the mining query form or contact us. For the wider method, see mineral prospectivity mapping.

▶ Remote sensing for mining explained in plain words · 2:01

Frequently asked questions

Where is quartz most commonly found?

In sand, sandstone, granite and veins. It is the primary mineral of beach, river and desert sand and a defining mineral of granite (geology.com; Wikipedia).

Which country produces the most quartz?

No single figure covers all quartz. For industrial sand, the United States led in 2025 with an estimated 120 million tonnes, ahead of China at 92 million. The United States was also estimated to lead in high-purity quartz (USGS, 2026).

Where is quartz mined in the United States?

Silica sand comes mainly from Texas, Wisconsin, Oklahoma and Louisiana. High-purity quartz comes from around Spruce Pine, North Carolina, and specimen crystal from the Ouachita Mountains of Arkansas.

Where is quartz sand found?

Quartz-rich sand and sandstone occur throughout the world. The largest listed producers are the United States, China and the Netherlands (USGS, 2026).

Can you find quartz in your own area?

Very likely, since it occurs in all parts of the world. Look in stream gravels, road cuts and rock outcrops. Get permission before collecting, and follow local land rules.

Is quartz rare?

No. Common quartz is abundant. What is limited is high-purity quartz: USGS says reserves are estimated to be limited to a few locations.

Is quartz the most abundant mineral on Earth?

It is the most abundant at the surface according to geology.com. In the lithosphere as a whole, it is second to the feldspar group, at about 12% by mass against 41%.

How does quartz form?

It crystallizes from cooling magma, grows from hot silica-rich water in veins, recrystallizes during metamorphism and forms as cement in sedimentary rock.

How much is quartz worth per ton?

Average US industrial sand was valued at about US$36 per tonne in 2025. High-purity quartz ranged from US$500 to US$12,000 per tonne (USGS estimates, 2026).

Is quartz found with gold?

Often, in vein deposits, but most quartz has no payable gold. Only assays can show whether a vein carries metal.

What is quartz used for?

Mainly frac sand and glass by tonnage. Smaller uses include foundry sand, silicon metal, crucibles for chips and solar wafers, oscillators and gemstones.

Is quartz dust dangerous?

Yes. Breathing fine crystalline silica can cause silicosis and other diseases. Use dust controls and proper respiratory protection on any site that crushes or drills it.