Lapis lazuli

Lapis lazuli is a deep blue rock.

It has gold spots inside. These spots look like tiny bits of sun. People use it to make pretty jewelry. They also make small statues and vases.

Long ago, artists crushed the rock into powder. They used this powder to make blue paint. This paint was used for special parts of paintings. Some people even used it as eye makeup. It is a very beautiful stone.

Lapis lazuli is a deep-blue rock. It is a metamorphic rock. This means it forms through heat and pressure.

The stone is made of several minerals. The main part is lazurite. This mineral gives the rock its bright blue color. It also contains white calcite and yellow pyrite. Pyrite looks like tiny gold spots.

People have mined this stone for a long time. Most lapis comes from Afghanistan. It was used in ancient Egypt for jewelry and amulets. Cleopatra even used powdered lapis as eyeshadow. In the past, artists used it to make a blue paint. We call this pigment ultramarine. They used it for important parts of paintings. The artist Vermeer used it in his famous painting, Girl with a Pearl Earring.

Today, people still use the stone. They make beads, boxes, and statues. Lapis can also be used for building finishes. Some people use other stones to look like it. These include sodalite or dyed jasper.

Lapis lazuli is a beautiful, deep-blue metamorphic rock. People have prized it for its intense color since ancient times. This stone is not just one single thing. It is a rock made of several different minerals. The most important part is lazurite, which makes up about 30% to 40% of the stone. You might also see white calcite or shiny, metallic yellow pyrite inside it.

The bright blue color comes from a special way the minerals work. Inside the lazurite, there are tiny things called radical anions. These are small parts that change how the crystal looks to our eyes. Specifically, a part called a trisulfur radical anion creates that famous blue. If other parts like disulfur or tetrasulfur are present, the color might shift toward yellow or red. This happens because these parts take the place of other parts in the crystal structure.

Humans have been mining this stone for thousands of years. As early as the 7th millennium BC, people were mining it in Badakhshan, Afghanistan. The Sar-i Sang mines in that area have been worked for over 6,000 years. Lapis lazuli was very important to the Indus Valley Civilisation between 3300 and 1900 BC. In ancient Egypt, it was used for jewelry and even as eyeshadow by Cleopatra. It was also found in the famous funeral mask of Tutankhamun.

This stone has a very long history in art. During the Middle Ages, people imported it to Europe to make a blue powder. This powder is called ultramarine pigment. Famous Renaissance and Baroque artists used it for their most important paintings. For example, the artist Vermeer used it in his famous work, Girl with a Pearl Earring.

Some artists even used it for the clothing of central figures, like the Virgin Mary.

Today, we still find lapis lazuli in many places around the world. While Afghanistan is a major source, it is also found in Russia and Chile. In Chile, the Inca people used it to carve beautiful jewelry. You can find smaller amounts in places like Italy, Canada, and the United States. People use the stone to make many things like beads, vases, and statues. If someone wants a similar look, they might use other stones like sodalite or dyed jasper instead.

Lapis lazuli is a deep-blue metamorphic rock. It is highly valued as a semi-precious stone because of its intense color. The name comes from the Persian word *lāžward*. This word is the root for many terms meaning blue, such as the English word "azure."

This rock is a complex mixture of several different minerals. The most important component is lazurite, which usually makes up 30% to 40% of the stone. Lazurite is a blue feldspathoid silicate mineral from the sodalite family. Lapis lazuli also contains calcite, which appears as white streaks. You will often see pyrite, which looks like metallic yellow specks. Some samples also contain minerals like diopside, enstatite, or mica. The rock typically forms in crystalline marble through a process called contact metamorphism.

The famous blue color is caused by a specific chemical mechanism. Inside the crystal structure, there are tiny parts called radical anions. Specifically, the trisulfur radical anion is responsible for the bright blue hue. These anions substitute for chloride anions within the sodalite structure. The presence of disulfur or tetrasulfur radicals can change the color. Disulfur can shift the stone toward yellow, while tetrasulfur can shift it toward red. The blue color occurs because these radicals create a visible absorption band between 595 and 620 nm.

Humans have mined lapis lazuli for thousands of years. As early as the 7th millennium BC, it was being mined in the Sar-i Sang mines in Badakhshan, Afghanistan. These mines have been in use for more than 6,000 years. Lapis lazuli was very important to the Indus Valley Civilisation from 3300 to 1900 BC. Artifacts made of the stone have been found at Bhirrana, the oldest site of that civilization. In ancient Egypt, it was used for amulets and ornaments. It was even used in the funeral mask of Tutankhamun, who ruled from 1341 to 1323 BC.

The history of the stone is also tied to art and religion. In the Middle Ages, Europeans imported the stone to grind into a powder. This powder was used to create a pigment called ultramarine. Many Renaissance and Baroque artists used ultramarine in their work. For example, Masaccio, Titian, and Vermeer all used it. It was often reserved for the clothing of central figures, such as the Virgin Mary.

Interestingly, ultramarine has been found in the dental tartar of medieval nuns and scribes. This suggests they may have licked their brushes while working on manuscripts.

Lapis lazuli is found in several major locations today. Afghanistan remains a primary source for the world. Significant amounts are also produced west of Lake Baikal in Russia. In the Andes mountains of Chile, the Inca people once used the stone for jewelry. Smaller amounts are mined in countries like Italy, Canada, and the United States. In California and Colorado, you can find smaller deposits. The stone is used commercially to make jewelry, carvings, mosaics, and vases.

Because the stone is expensive, people sometimes use substitutes. Spinel, sodalite, or even dyed jasper can be used to mimic its appearance. In the 19th century, a synthetic version of ultramarine became available. This changed how artists used the pigment. Today, the stone is still a subject of study and trade. However, mining in some areas, like the Kuran wa Munjan district, involves unethical working conditions. In 2014, armed groups in Afghanistan reportedly made millions of dollars from these mines.