Lapis lazuli from Afghanistan in its natural state
|mixture of minerals with "lazurite as the main constituent.|
|"Crystal system||None, as lapis is a rock. "Lazurite, the main constituent, frequently occurs as "dodecahedra|
|Color||"Blue, mottled with white "calcite and brassy "pyrite|
|"Crystal habit||Compact, massive|
|"Mohs scale hardness||5–5.5|
|Other characteristics||The variations in composition cause a wide variation in the above values.|
Lapis lazuli ("/
At the end of the "Middle Ages, lapis lazuli began to be exported to Europe, where it was ground into powder and made into "ultramarine, the finest and most expensive of all blue "pigments. It was used by some of the most important artists of the "Renaissance and "Baroque, including "Masaccio, "Perugino, "Titian and "Vermeer, and was often reserved for the clothing of the central figures of their paintings, especially the "Virgin Mary.
Today, mines in northeast Afghanistan and Pakistan are still the major source of lapis lazuli. Important amounts are also produced from mines west of "Lake Baikal in Russia, and in the "Andes mountains in Chile. Smaller quantities are mined in Italy, Mongolia, the United States, and Canada.
Lapis is the "Latin word for "stone" and lazuli is the "genitive form of the "Medieval Latin lazulum, which is taken from the "Arabic لاجورد lājaward, itself from the "Persian لاجورد lājevard, which is the name of the stone in Persian and also of a place where lapis lazuli was mined.
The most important mineral component of lapis lazuli is "lazurite (25% to 40%), a "feldspathoid "silicate mineral with the formula (Na,Ca)8(AlSiO4)6(S,SO4,Cl)1-2. Most lapis lazuli also contains "calcite (white), "sodalite (blue), and "pyrite (metallic yellow). Some samples of lapis lazuli contain "augite; "diopside; "enstatite; "mica; "hauynite; "hornblende, "nosean, and sulfur-rich "löllingite geyerite.
The intense blue color is due to the presence of the "trisulfur (S
3) "radical anion in the crystal. An electronic excitation of one electron from the highest doubly filled "molecular orbital (No. 24) into the lowest singly occupied orbital (No. 25) results in a very intense "absorption line at λmax ~617 nm.
Lapis lazuli is found in limestone in the "Kokcha River valley of "Badakhshan province in northeastern Afghanistan, where the "Sar-e-Sang mine deposits have been worked for more than 6,000 years. Afghanistan was the source of lapis for the ancient Egyptian and Mesopotamian civilizations, as well as the later Greeks and Romans. Ancient Egyptians obtained this material through trade from Afghanistan with the Aryans. During the height of the "Indus Valley Civilisation about 2000 BC, the Harappan colony now known as "Shortugai was established near the lapis mines.
According to the "Sorbonne's mineralogist Pierre Bariand's leading work on the sources of lapis lazuli in modern times, and to references in Afghanistan's Blue Treasure: Lapis Lazuli (2011) by Lailee McNair Bakhtiar, the lapis lazuli is found in "caves" not traditionally considered "mines" and the stone lapis lazuli is from the primary source of the Hindu Kush Mountains in Afghanistan's Kochka River Valley and not in Pakistan.["citation needed]
In addition to the Afghan deposits, lapis is also extracted in the "Andes (near "Ovalle, "Chile); and to the west of "Lake Baikal in Siberia, Russia, at the Tultui Lazurite deposit. It is mined in smaller amounts in "Angola; Argentina; "Burma; Pakistan; Canada; Italy, India; and in the United States in "California and "Colorado.
Lapis takes an excellent polish and can be made into jewelry, carvings, boxes, "mosaics, ornaments, small statues, and vases. During the "Renaissance, Lapis was ground and processed to make the "pigment "ultramarine for use in "frescoes and "oil painting. Its usage as a pigment in oil paint largely ended in the early 19th century when a chemically identical synthetic variety became available.
Lapis lazuli is commercially synthesized or simulated by the Gilson process, which is used to make artificial "ultramarine and hydrous zinc phosphates. It may also be substituted by "spinel or "sodalite, or by dyed "jasper or "howlite.
A "Mesopotamian lapis lazuli pendant circa 2900 BC
Close-up of the lapis lazuli inlays in the 25th-century BC "Statue of Ebih-Il
"Tsarevich (Fabergé egg). The gold motifs cover the joints, making the egg look as if it was carved from a single block of lapis lazuli
In the funeral mask of "Tutankhamun (1341-1323 BC), lapis lazuli was used for the eyebrows of the young Pharaoh
Carved lapis lazuli mountain scene, from the Chinese "Qing Dynasty (1644–1912)
Lapis lazuli has been mined in Afghanistan and exported to the Mediterranean world and South Asia since the "Neolithic age. Lapis lazuli beads have been found at "Mehrgarh, a neolithic site near "Quetta in Pakistan, on the ancient trade route between Afghanistan and the "Indus Valley, dating to the 7th millennium BC. Quantities of these beads have also been found at 4th millennium BC settlements in Northern "Mesopotamia, and at the "Bronze Age site of "Shahr-e Sukhteh in southeast Iran (3rd millennium BC). A dagger with a lapis handle, a bowl inlaid with lapis, and amulets, beads, and inlays representing eyebrows and beards, were found in the Royal Tombs of the Sumerian city-state of "Ur from the 3rd Millennium BC.
Lapis was also used in ancient Mesopotamia by the "Akkadians, "Assyrians, and "Babylonians for "seals and jewelry. In the Mesopotamian poem the "Epic of Gilgamesh (17th-18th Century BC), one of the oldest known works of literature, lapis lazuli is mentioned several times. The "Statue of Ebih-Il, a 3rd millennium BC statue found in the ancient city-state of "Mari in modern-day "Syria, now in the "Louvre, uses lapis lazuli inlays for the irises of the eyes.
In ancient Egypt, lapis lazuli was a favorite stone for amulets and ornaments such as "scarabs. Lapis jewelry has been found at excavations of the "Predynastic Egyptian site "Naqada (3300–3100 BC). At "Karnak, the relief carvings of "Thutmose III (1479-1429 BC) show fragments and barrel-shaped pieces of lapis lazuli being delivered to him as tribute. Powdered lapis was used as eyeshadow by "Cleopatra.
In late classical times and as late as the Middle Ages, lapis lazuli was often called "sapphire (sapphirus in Latin, sappir in Hebrew), though it had little to do with the stone today known as the blue "corundum variety sapphire. In his book on stones, the Greek scientist Theophrastus described "the sapphirus, which is speckled with gold," a description which matches lapis lazuli.
There are many references to sapphires in the "Old Testament, but most scholars agree that, since sapphire was not known before the Roman Empire, they most likely are references to lapis lazuli. For instance, Exodus 24:10: "As they saw the God of Israel, and there was under his feet as it were a paved work of a sapphire stone.." (KJV). The term used in the Latin Vulgate Bible in this citation is "lapidus sapphiri," the term for lapis lazuli. Modern translations of the Bible, such as the New Living Translation Second Edition, refer to lapis lazuli in most instances instead of sapphire.
In antiquity and as late as the Middle Ages, the name sapphire was understood to mean what is today described as lapis lazuli.
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