Amber

Amber is a pretty stone.

It starts as sticky juice from a tree. Over a long time, this juice turns hard.

This happens because of heat and heavy weight from the ground.

Sometimes, tiny bugs or plants get stuck in the juice. They stay trapped inside the stone forever.

This makes the amber very special to see.

Amber can be many colors. It can be orange, brown, or even red. People use it to make beautiful jewelry.

It is a very old and lovely treasure.

Amber is a beautiful gemstone.

It starts as sticky tree resin. Resin is a thick juice from a tree.

Over a very long time, this resin changes. It turns into hard amber through a set of steps.

First, the resin must stay safe from rain and sun. If it breaks down, it will not become amber. Then, heavy layers of earth press down on it. High heat and pressure work on the resin. This turns it into copal. More heat and pressure then turn the copal into amber.

Sometimes, things get stuck in the sticky resin.

You might see a tiny ant or a plant inside. These are called inclusions.

These trapped bits tell us about the past.

Amber can be many colors. It is often orange, brown, or red.

People have used it for jewelry for a long time. It can even hold a charge of static electricity. This is why the word "electric" comes from the Greek word for amber.

Amber is a beautiful gemstone made from fossilized tree resin.

It is prized for its lovely colors like orange, brown, and red.

People have used amber for jewelry since ancient times. Some even used it as a healing agent in folk medicine. Because it starts as a soft, sticky liquid, it can trap things.

You might find bits of plants or animals stuck inside. These trapped pieces are called inclusions.

How does sticky resin become a hard stone? It is a slow thing that happens over a long time. First, the resin must be able to resist decay. Sunlight, rain, and tiny germs can break most resin down. If the resin stays safe, heavy layers of earth cover it. This creates high heat and pressure from the sediment above. This process turns the resin into copal first. Eventually, more heat and pressure turn the copal into true amber.

Humans have been interested in amber for thousands of years. In the 4th century BCE, a man named Theophrastus wrote about it. Another traveler named Pytheas also spoke of amber in his work. He said the waves washed amber up on shores. People in Germany used it for fuel and sold it. There was even a special path called the "Amber Road." This path connected the Baltic Sea to the Mediterranean.

Amber is found in many places around the world today. About 90% of the world's amber is in the Kaliningrad Oblast. This area was once part of Prussia. In the 19th century, people found amber in New Jersey, USA. Another big source is Kachin State in northern Myanmar. This area has provided amber to China for 1,800 years. Some amber is found in coal seams, too. This special kind is called ambrite in New Zealand.

Amber has a very special connection to electricity. The Greek word for amber is *elektron*. This word gave us the modern word "electric." This happened because amber can hold a static charge. If you rub it, it can attract light things like leaves. Even the word "electron" comes from this history. A physicist named George Stoney coined that term in 1891. It is amazing how a piece of tree juice connects to science!

Amber is a gemstone made from fossilized tree resin.

It is highly valued for its natural beauty and colors, which range from orange and brown to red.

Beyond its use in jewelry, amber has been used in folk medicine as a healing agent. Because it begins as a soft, sticky substance, it often captures plant or animal material. These trapped specimens are known as inclusions.

Scientists classify amber into five different classes based on their chemical constituents.

The transformation from sticky resin to hard stone is a complex process. It begins when a tree produces resin that is resistant to decay. Most resin is broken down by sunlight, rain, or microorganisms. However, if the resin is protected from these forces, it can begin to fossilize. Over long periods, overlying sediment creates high temperatures and intense pressure. This causes molecular polymerization, where small molecules join into larger ones. First, the resin transforms into an intermediate stage called copal. Continued heat and pressure eventually drive off terpenes and result in true amber.

Amber is chemically heterogeneous, meaning it is made of several different substances. It consists of resinous materials that can dissolve in alcohol, ether, or chloroform. It also contains an insoluble bituminous fraction. The material is a macromolecule formed by the polymerization of terpenoid precursors. In gymnosperms, these are often diterpenes like communic acid. In angiosperms, triterpenes usually dominate the composition. Most amber has a hardness between 2.0 and 2.5 on the Mohs scale. It has a specific gravity between 1.06 and 1.10 and a melting point between 250 and 300 °C.

History shows that humans have traded amber for millennia. In the 4th century BCE, Theophrastus and the traveler Pytheas both discussed the substance. Pytheas noted that waves washed amber onto the shores of an island called Abalus. This led to the creation of the "Amber Road," a trade route connecting the Baltic region to the Mediterranean. The Romans traded for amber from the southern Baltic as far back as the time of Nero. In China, the first written records of amber date back to 200 BCE. In North America, the first reports of amber came from New Jersey in the early 19th century.

Today, amber is found on or near every continent, mostly in rocks from the Cretaceous age or younger. The Kaliningrad Oblast in Russia is a major global source. Historically, the coast of Prussia was the world's leading source. Approximately 90% of the world's extractable amber is located in this specific area. Other important sources include Kachin State in Myanmar and the Rivne Oblast in Ukraine. In New Zealand, amber found specifically in coal seams is called ambrite. Amber found in other coal seams is known as resinite.

Amber has a unique relationship with physics and electricity. The ancient Greek word for amber is *elektron*. This term is linked to the word for the "beaming Sun." Because amber can hold a static electric charge, it can attract light objects like leaves or chaff. This property led to the derivation of the modern word "electric." In 1600, William Gilbert used the Latin *electricus*, meaning "amber-like." Later, in 1891, physicist George Stoney coined the word "electron" while studying elementary charges.

There are many ways to collect and process this material. Some amber is found by hand or diving when waves wash it onto beaches.

In other places, it is mined through open works or underground galleries. In the Dominican Republic, miners use a method called bell pitting. This can be dangerous due to the risk of tunnel collapses. Once collected, amber may be cleaned in revolving barrels with sand and water. It can also be heated in an oil bath to make it soft and flexible. Factories may use a lathe to polish the stones for use in tools or jewelry.