Pyrite

This rock looks like gold.

Some call it fool's gold. It is actually a mineral named pyrite.

Pyrite can make bright sparks. This happens when you strike it against steel. People used these sparks to start fires.

It often grows in shapes like cubes. It can also look like a round ball. Some pieces have many flat sides.

Pyrite is very hard and breaks easily. Real gold is soft and bends. This helps you tell them apart.

People use pyrite to make jewelry. It is also used to make parts for batteries. It is a very useful stone.

Pyrite is a mineral that looks like gold.

Because of this, many people call it "fool's gold." It is made of iron and sulfur. This mineral is the most common sulfide mineral on Earth.

Pyrite has many interesting shapes. It often grows as cubes. Sometimes it forms round shapes called framboids. It can even form shapes with many flat sides. These are called pyritohedra.

This stone can make sparks. This happens when you strike it against steel. In the past, people used these sparks to fire guns. The Kaurna people used it to start fires too.

Pyrite is useful in many ways. It is used to make jewelry. People also use it to make parts for batteries. It can even be used to make solar cells. This is because it is a semiconductor. A semiconductor is a material that can carry electricity.

Scientists are still finding new ways to use this special stone.

Pyrite is a very common mineral on Earth. It is a sulfide mineral made of iron and sulfur.

Many people call it "fool's gold." This is because it has a shiny, brassy color. It looks a lot like real gold at first glance. However, pyrite is much harder and more brittle than gold. Gold is malleable, which means it can be shaped without breaking. Pyrite will simply snap or shatter if you try to bend it.

This mineral works in many ways to create sparks. The name pyrite comes from a Greek word. It means "stone which strikes fire." When you strike pyrite against steel, it creates sparks. In the 16th and 17th centuries, people used this for guns. These guns were called wheellocks. A small piece of pyrite was placed against a file. The friction would create the sparks needed to fire the gun. The Kaurna people of South Australia also used pyrite. They used it with flintstone and stringybark to start fires.

People have found many ways to use pyrite through history. In ancient times, it was used to make copperas. This is a substance called ferrous sulfate. People would heap up pyrite and let it weather. This process is called heap leaching. The acidic runoff from the pile was then boiled with iron. By the 19th century, this was a main way to make sulfuric acid. Today, pyrite is still used in the paper industry. It is also used to make sulfur dioxide.

Pyrite is also a very important material for modern science. It is a semiconductor, which means it can carry electricity. In the early 1900s, it was used in radio receivers. These were called crystal detectors. Now, scientists use pyrite for new technology. It can be used as a part in lithium metal batteries. It is also being studied for use in solar panels. Researchers want to make thin-film solar cells using only pyrite.

If you look closely at pyrite, you will see amazing shapes. It often grows in perfect cubes. Sometimes it forms shapes called pyritohedra. These look like a dodecahedron with twelve sides.

Pyrite is also found near real gold. Some gold is actually hidden inside the pyrite. This is called "invisible gold." It is tucked away inside the mineral's structure. Collectors love finding beautiful pyrite crystals in places like Spain. You can find great specimens in the Soria and La Rioja provinces.

Pyrite is a common mineral known as iron pyrite. Its chemical formula is FeS2, which means it is an iron disulfide.

It is the most abundant sulfide mineral on Earth. Many people call it "fool's gold" because of its metallic luster and pale brass-yellow color. This appearance makes it look very similar to real gold. However, the two minerals are very different. Gold is malleable, meaning it can be shaped without breaking. Pyrite is brittle, so it will shatter if you try to bend it.

The name pyrite comes from the Greek word "pyrites." This means "stone or mineral which strikes fire." This name describes how the mineral behaves when struck against steel. In ancient Roman times, people used various stones to create sparks. By the time of Georgius Agricola in the 1500s, the term referred to all sulfide minerals. The mineral's ability to create sparks led to many historical uses. For example, the Kaurna people of South Australia used pyrite with flintstone to start fires.

In the 16th and 17th centuries, pyrite was used in early firearms called wheellocks. A small sample of pyrite was placed against a circular file. The friction from the file created the sparks needed to fire the gun. Pyrite has also been used for chemical manufacturing since classical times. People used it to make copperas, which is ferrous sulfate. They did this through a process called heap leaching. They heaped up pyrite and allowed it to weather. The resulting acidic runoff was boiled with iron to produce iron sulfate. By the 19th century, this became the main method for making sulfuric acid.

Pyrite has a very specific crystal structure. It is a cubic structure where iron atoms form a face-centered cubic sublattice.

In this structure, the sulfur atoms do not sit alone. Instead, they occur in pairs called persulfide units. Because of these S-S bonds, some scientists call it iron persulfide. The iron atoms are bonded to six sulfur atoms. This creates a shape called a distorted octahedron. This structure was one of the first to be solved using X-ray diffraction. It is a prototype for many other similar compounds in science.

Modern technology uses pyrite for its electronic properties. Pyrite is a semiconductor, which means it can conduct electricity under certain conditions. It has a band gap of 0.95 eV. In the early 20th century, people used pyrite as a mineral detector in radio receivers. These were called crystal detectors. They were very sensitive and dependable before vacuum tubes were invented. Today, pyrite is used as a cathode material in certain lithium metal batteries. Scientists are also studying it for use in photovoltaic solar panels. They want to create thin-film solar cells made entirely of pyrite.

Pyrite can grow in many interesting shapes. It often forms simple cubes or raspberry-shaped masses called framboids. Sometimes it forms a shape called a pyritohedron. A pyritohedron looks like a dodecahedron with twelve sides.

Pyrite is also found in association with real gold. Sometimes, a large amount of gold is actually trapped inside the pyrite. This is called "invisible gold." Even though it is called fool's gold, it can be a source of real wealth. China is currently the largest market for imported unroasted iron pyrites. They make up 65% of global imports.

Recent research has opened new doors for this mineral. In 2020, scientists found that voltage can change pyrite. It can turn from a diamagnetic material into a ferromagnetic material. This could help create new types of magnetic data storage. Researchers at Trinity College Dublin also studied how to peel pyrite into very thin layers. They call this liquid-phase exfoliation. They turned bulk pyrite into two-dimensional nanosheets. These nanosheets worked well as an anode in lithium-ion batteries. This shows that even an old mineral can lead to new discoveries.