|Color||Virtually all colors, mostly green|
|Crystal habit||Intergrown grainy or fine fibrous aggregate|
|Mohs scale hardness||6–7|
Jade is a mineral used as jewellery or for ornaments. It is typically green, although may be yellow or white. Jade can refer to either of two different silicate minerals: nephrite (a silicate of calcium and magnesium in the amphibole group of minerals), or jadeite (a silicate of sodium and aluminium in the pyroxene group of minerals). 
Jade is well known for its ornamental use in East Asian, South Asian, and Southeast Asian art. It is commonly used in Latin America, such as Mexico and Guatemala. The use of jade in Mesoamerica for symbolic and ideological ritual was influenced by its rarity and value among pre-Columbian Mesoamerican cultures, such as the Olmecs, the Maya, and other ancient civilizations of the Valley of Mexico.
The English word "jade" is derived from the Spanish term piedra de ijada, which means 'loin stone', as it was believed to cure ailments of the loins and kidneys. Jadeite, a type of jade, was imported to China from Burma starting in 1800 and became highly popular. In pre-Columbian Mesoamerica, jade was a rare and valued material, mainly sourced from the Motagua River valley in Guatemala. Jade played a crucial role in Māori culture in New Zealand, where it is called pounamu, and was used to create various tools, weapons, and ornaments. Jade has been mined in Canada since the 1970s, and it is also found in Russia, where it is used in jewelry production.
|Alternative Chinese name|
The English word jade is derived (via French l'ejade and Latin ilia 'flanks,kidney area')  from the Spanish term piedra de ijada (first recorded in 1565) or 'loin stone',from its reputed efficacy in curing ailments of the loins and kidneys. Nephrite is derived from lapis nephriticus,a Latin translation of the Spanish piedra de ijada. 
During Neolithic times,the key known sources of nephrite jade in China for utilitarian and ceremonial jade items were the now-depleted deposits in the Ningshao area in the Yangtze River Delta (Liangzhu culture 3400–2250 BC) and in an area of the Liaoning province and Inner Mongolia (Hongshan culture 4700–2200 BC).  Dushan Jade (imitation jade) was being mined as early as 6000 BC. In the Yin Ruins of the Shang Dynasty (1600 to 1050 BC) in Anyang,Dushan Jade ornaments were unearthed in the tomb of the Shang kings.
Jade was considered to be the "imperial gem" and was used to create many utilitarian and ceremonial objects,from indoor decorative items to jade burial suits. From the earliest Chinese dynasties to the present,the jade deposits most used were not only those of Khotan in the Western Chinese province of Xinjiang but other parts of China as well,such as Lantian,Shaanxi. There,white and greenish nephrite jade is found in small quarries and as pebbles and boulders in the rivers flowing from the Kuen-Lun mountain range eastward into the Takla-Makan desert area. The river jade collection is concentrated in the Yarkand,the White Jade (Yurungkash) and Black Jade (Karakash) Rivers. From the Kingdom of Khotan,on the southern leg of the Silk Road,yearly tribute payments consisting of the most precious white jade were made to the Chinese Imperial court and there worked into objets d'art by skilled artisans as jade had a status-value exceeding that of gold or silver. Jade became a favourite material for the crafting of Chinese scholars' objects,such as rests for calligraphy brushes,as well as the mouthpieces of some opium pipes,due to the belief that breathing through jade would bestow longevity upon smokers who used such a pipe. 
Jadeite,with its bright emerald-green,pink,lavender,orange and brown colours was imported from Burma to China only after about 1800. The vivid green variety became known as Feicui (翡翠) or Kingfisher (feathers) Jade. It quickly became almost as popular as nephrite and a favorite of Qing Dynasty's nouveau riche,while scholars still had strong attachment to nephrite (white jade,or Khotan),which they deemed to be the symbol of a nobleman.
In the history of the art of the Chinese empire,jade has had a special significance,comparable with that of gold and diamonds in the West.  Jade was used for the finest objects and cult figures,and for grave furnishings for high-ranking members of the imperial family.  Due to that significance and the rising middle class in China,in 2010 the finest jade when found in nuggets of "mutton fat" jade –so-named for its marbled white consistency –could sell for $3,000 an ounce,a tenfold increase from a decade previously. 
The Chinese character 玉  (yù) is used to denote the several types of stone known in English as "jade" (e.g. 玉器,jadewares),such as jadeite (硬玉,'hard jade',another name for 翡翠) and nephrite (軟玉,'soft jade'). But because of the value added culturally to jades throughout Chinese history,the word has also come to refer more generally to precious or ornamental stones,  and is very common in more symbolic usage as in phrases like 拋磚引玉/抛砖引玉(lit. "casting a brick (i.e. the speaker's own words) to draw a jade (i.e. pearls of wisdom from the other party)"),玉容(a beautiful face;"jade countenance"),and 玉立(slim and graceful;"jade standing upright"). The character has a similar range of meanings when appearing as a radical as parts of other characters.
Jade in Japan was used for jade bracelets. It was a symbol of wealth and power. Leaders also used jade in rituals. It is the national stone of Japan. Examples of use in Japan can be traced back to the early Jomon period about 7,000 years ago. XRF analysis results have revealed that all jade used in Japan since the Jomon period is from Itoigawa. The jade culture that blossomed in ancient Japan respected green ones,and jade of other colors was not used. There is a theory that the reason why the meaning is that it was believed that the color of green enables the reproduction of fertility,the life,and the soul of the earth.
The use of jade and other greenstone was a long-term tradition in Korea (c. 850 BC –AD 668). Jade is found in small numbers of pit-houses and burials. The craft production of small comma-shaped and tubular "jades" using materials such as jade,microcline,jasper,etc.,in southern Korea originates from the Middle Mumun Pottery Period (c. 850–550 BC).  Comma-shaped jades are found on some of the gold crowns of Silla royalty (c. 300/400–668 AD) and sumptuous elite burials of the Korean Three Kingdoms. After the state of Silla united the Korean Peninsula in 668,the widespread popularisation of death rituals related to Buddhism resulted in the decline of the use of jade in burials as prestige mortuary goods.
The Jain temple of Kolanpak in the Nalgonda district,Telangana,India is home to a 5-foot (1.5 m) high sculpture of Mahavira that is carved entirely out of jade. India is also noted for its craftsman tradition of using large amounts of green serpentine or false jade obtained primarily from Afghanistan in order to fashion jewellery and ornamental items such as sword hilts and dagger handles. 
The Salar Jung Museum in Hyderabad has a wide range of jade hilted daggers,mostly owned by the former Sultans of Hyderabad.
Today,it is estimated that Myanmar is the origin of upwards of 70% of the world's supply of high-quality jadeite. Most of the jadeite mined in Myanmar is not cut for use in Myanmar,instead being transported to other nations,primarily in Asia,for use in jewelry and other products. The jadeite deposits found in Kachinland,in Myanmar's northern regions is the highest quality jadeite in the world,considered precious by sources in China going as far back as the 10th century.
Jadeite in Myanmar is primarily found in the "Jade Tract" located in Lonkin Township in Kachin State in northern Myanmar which encompasses the alluvial region of the Uyu River between the 25th and 26th parallels. Present-day extraction of jade in this region occurs at the Phakant-gyi,Maw Se Za,Tin Tin,and Khansee mines. Khansee is also the only mine that produces Maw Sit Sit,a type of jade. Mines at Tawmao and Hweka are mostly exhausted. From 1964 to 1981,mining was exclusively an enterprise of the Myanmar government. In 1981,1985,and 1995,the Gemstone laws were modified to allow increasing private enterprise. In addition to this region,there are also notable mines in the neighboring Sagaing District,near the towns of Nasibon and Natmaw and Hkamti. Sagaing is a district in Myanmar proper,not a part of the ethic Kachin State.
Carved nephrite jade was the main commodity trade during the historical Maritime Jade Road,an extensive trading network connecting multiple areas in Southeast and East Asia. The nephrite jade was mined in east Taiwan by animist Taiwanese indigenous peoples and processed mostly in the Philippines by animist indigenous Filipinos. Some were also processed in Vietnam,while the peoples of Malaysia,Brunei,Singapore,Thailand,Indonesia,and Cambodia also participated in the massive animist-led nephrite jade trading network,where other commodities were also traded. Participants in the network at the time had a majority animist population. The maritime road is one of the most extensive sea-based trade networks of a single geological material in the prehistoric world. It was in existence for at least 3,000 years,where its peak production was from 2000 BCE to 500 CE,older than the Silk Road in mainland Eurasia. It began to wane during its final centuries from 500 CE until 1000 CE. The entire period of the network was a golden age for the diverse animist societies of the region.     
Nephrite jade in New Zealand is known as pounamu in the Māori language (often called "greenstone" in New Zealand English),and plays an important role in Māori culture. It is considered a taonga ,or treasure,and therefore protected under the Treaty of Waitangi,and the exploitation of it is restricted and closely monitored. It is found only in the South Island of New Zealand,known as Te Wai Pounamu in Māori—"The [land of] Greenstone Water",or Te Wahi Pounamu—"The Place of Greenstone".
Pounamu taonga increase in mana (prestige) as they pass from one generation to another. The most prized taonga are those with known histories going back many generations. These are believed to have their own mana and were often given as gifts to seal important agreements.
Tools,weapons and ornaments were made of it;in particular adzes,the 'mere' (short club),and the hei-tiki (neck pendant). Nephrite jewellery of Maori design is widely popular with locals and tourists,although some of the jade used for these is now imported from British Columbia and elsewhere. 
Pounamu taonga include tools such as toki (adzes),whao (chisels),whao whakakōka (gouges),ripi pounamu (knives),scrapers,awls,hammer stones,and drill points. Hunting tools include matau (fishing hooks) and lures,spear points,and kākāporia (leg rings for fastening captive birds);weapons such as mere (short handled clubs);and ornaments such as pendants (hei-tiki,hei matau and pekapeka),ear pendants (kuru and kapeu),and cloak pins.   Functional pounamu tools were widely worn for both practical and ornamental reasons,and continued to be worn as purely ornamental pendants (hei kakï) even after they were no longer used as tools. 
Jade was a rare and valued material in pre-Columbian Mesoamerica. The only source from which the various indigenous cultures,such as the Olmec and Maya,could obtain jade was located in the Motagua River valley in Guatemala.  Jade was largely an elite good,and was usually carved in various ways,whether serving as a medium upon which hieroglyphs were inscribed,or shaped into symbolic figurines. Generally,the material was highly symbolic,and it was often employed in the performance of ideological practices and rituals.
Jade was first identified in Canada by Chinese settlers in 1886 in British Columbia.[ citation needed ] At this time jade was considered worthless because they were searching for gold.[ citation needed ] Jade was not commercialized in Canada until the 1970s. The mining business Loex James Ltd.,which was started by two Californians,began commercial mining of Canadian jade in 1972. 
Mining is done from large boulders that contain bountiful deposits of jade. Jade is exposed using diamond-tipped core drills in order to extract samples. This is done to ensure that the jade meets requirements. Hydraulic spreaders are then inserted into cleavage points in the rock so that the jade can be broken away. Once the boulders are removed and the jade is accessible,it is broken down into more manageable 10-tonne pieces using water-cooled diamond saws. The jade is then loaded onto trucks and transported to the proper storage facilities. 
Russia imported jade from China for a long time,but in the 1860s its own jade deposits were found in Siberia. Today,the main deposits of jade are located in Eastern Siberia,but jade is also extracted in the Polar Urals and in the Krasnoyarsk territory (Kantegirskoye and Kurtushibinskoye deposits). Russian raw jade reserves are estimated at 336 tons.  Russian jade culture is closely connected with such jewellery production as Fabergé,whose workshops combined the green stone with gold,diamonds,emeralds,and rubies.
It was not until 1863 that French mineralogist Alexis Damour determined that what was referred to as "jade" could in fact be one of two different minerals,either nephrite or jadeite. 
Nephrite consists of a microcrystalline interlocking fibrous matrix of the calcium,magnesium-iron rich amphibole mineral series tremolite (calcium-magnesium)-ferroactinolite (calcium-magnesium-iron). The middle member of this series with an intermediate composition is called actinolite (the silky fibrous mineral form is one form of asbestos). The higher the iron content,the greener the colour. Tremolite occurs in metamorphosed dolomitic limestones and Actinolite in metamorphic greenschists/glaucophane schists.
Jadeite is a sodium- and aluminium-rich pyroxene. The more precious kind of jade,this is a microcrystalline interlocking growth of crystals (not a fibrous matrix as nephrite is.) It only occurs in metamorphic rocks.
Both nephrite and jadeite were used from prehistoric periods for hardstone carving. Jadeite has about the same hardness (between 6.0 and 7.0 Mohs hardness) as quartz,while nephrite is slightly softer (6.0 to 6.5) and so can be worked with quartz or garnet sand,and polished with bamboo or even ground jade.[ citation needed ] However nephrite is tougher and more resistant to breakage. Among the earliest known jade artifacts excavated from prehistoric sites are simple ornaments with bead,button,and tubular shapes.  Additionally,jade was used for adze heads,knives,and other weapons,which can be delicately shaped.
As metal-working technologies became available,the beauty of jade made it valuable for ornaments and decorative objects.
The name Nephrite derives from the Greek word meaning "kidney". This is because in ancient times it was believed that wearing this kind of jade around the waist could cure kidney disease. 
Nephrite can be found in a creamy white form (known in China as "mutton fat" jade) as well as in a variety of light green colours,whereas jadeite shows more colour variations,including blue,brown,red,black,dark green,lavender and white.  Of the two,jadeite is rarer,documented in fewer than 12 places worldwide. Translucent emerald-green jadeite is the most prized variety,both historically and today. As "quetzal" jade,bright green jadeite from Guatemala was treasured by Mesoamerican cultures,and as "kingfisher" jade,vivid green rocks from Burma became the preferred stone of post-1800 Chinese imperial scholars and rulers. Burma (Myanmar) and Guatemala are the principal sources of modern gem jadeite. In the area of Mogaung in the Myitkyina District of Upper Burma,jadeite formed a layer in the dark-green serpentine,and has been quarried and exported for well over a hundred years.  Canada provides the major share of modern lapidary nephrite.
Jade may be enhanced (sometimes called "stabilized"). Some merchants will refer to these as grades,but degree of enhancement is different from colour and texture quality. In other words,Type A jadeite is not enhanced but can have poor colour and texture. There are three main methods of enhancement,sometimes referred to as the ABC Treatment System: 
The jade trade in Myanmar consists of the mining, distribution, and manufacture of jadeite—a variety of jade—in the nation of Myanmar (Burma). The jadeite deposits found in Myanmar's northern regions are the source of the highest quality jadeite in the world, noted by sources in China going as far back as the 10th century. Chinese culture places significant weight on the meaning of jade; as their influence has grown in Myanmar, so has the jade industry and the practice of exporting the precious mineral.Myanmar produces upward of 70 percent of the world's supply of high-quality jadeite.   Most of the Myanmar's jadeite is exported to other nations, primarily Asian, for use in jewellery, art, and ornaments. The majority of the production is carried out by Myanma Gem Enterprise (MGE), a state-owned venture which has enough liquid assets to run itself for 172 years. 
Actinolite is an amphibole silicate mineral with the chemical formula Ca2(Mg4.5-2.5Fe2+0.5-2.5)Si8O22(OH)2.
The hei-tiki is an ornamental pendant of the Māori of New Zealand. Hei-tiki are usually made of pounamu (greenstone), and are considered a taonga (treasure) by Māori. They are commonly called tiki by New Zealanders, a term that originally refers to large human figures carved in wood and to the small wooden carvings used to mark sacred places.
The Karakash or Black Jade River, also spelled Karakax, is a river in the Xinjiang autonomous region of the People's Republic of China that originates in Aksai Chin. It passes through the historical settlement of Xaidulla and passes by the city of Khotan (Hotan) to flow northeast in the Tarim Basin. It merges with the Yurungkash River, the combined river taking the name Hotan River and flowing into the Tarim River.
Jadeite is a pyroxene mineral with composition NaAlSi2O6. It is hard (Mohs hardness of about 6.5 to 7.0), very tough, and dense, with a specific gravity of about 3.4. It is found in a wide range of colors, but is most often found in shades of green or white. Jadeite is formed only in subduction zones on continental margins, where rock undergoes metamorphism at high pressure but relatively low temperature.
Nephrite is a variety of the calcium, magnesium, and iron-rich amphibole minerals tremolite or actinolite (aggregates of which also make up one form of asbestos). The chemical formula for nephrite is Ca2(Mg, Fe)5Si8O22(OH)2. It is one of two different mineral species called jade. The other mineral species known as jade is jadeite, which is a variety of pyroxene. While nephrite jade possesses mainly grays and greens (and occasionally yellows, browns, black or whites), jadeite jade, which is rarer, can also contain blacks, reds, pinks and violets. Nephrite jade is an ornamental stone used in carvings, beads, or cabochon cut gemstones. Nephrite is also the official state mineral of Wyoming.
The mere is a type of short, broad-bladed weapon in the shape of an enlarged tear drop. It was used to strike/jab an opponent in the body or the head, usually made from nephrite jade. A mere is one of the traditional, hand to hand, one-handed weapons of the indigenous Māori of New Zealand, and a symbol of chieftainship.
Bowenite is a hard, compact variety of the serpentinite species antigorite, (Mg3(OH)O4Si2O5). Classed as semi-precious gemstone it has been used for tools, weapons and jewellery by the Māori in New Zealand, and for jewellery by Fabergé. Deposits are found in several places around the world including Afghanistan, China, New Zealand, South Africa and the United States. It typically ranges in colour from dark green to light olive green, and in shades approaching yellow. Bowenite was named by James D. Dana in 1850 after George T. Bowen, who analyzed it in 1822.
The Sa Huỳnh culture was a culture in modern-day central and southern Vietnam that flourished between 1000 BC and 200 AD. Archaeological sites from the culture have been discovered from the Mekong Delta to Quảng Bình province in central Vietnam. The Sa Huynh people were most likely the predecessors of the Cham people, an Austronesian-speaking people and the founders of the kingdom of Champa.
The use of jade in Mesoamerica for symbolic and ideological ritual was highly influenced by its rarity and value among pre-Columbian Mesoamerican cultures, such as the Olmec, the Maya, and the various groups in the Valley of Mexico. Although jade artifacts have been created and prized by many Mesoamerican peoples, the Motagua River valley in Guatemala was previously thought to be the sole source of jadeite in the region.
Chinese jade refers to the jade mined or carved in China from the Neolithic onward. It is the primary hardstone of Chinese sculpture. Although deep and bright green jadeite is better known in Europe, for most of China's history, jade has come in a variety of colors and white "mutton-fat" nephrite was the most highly praised and prized. Native sources in Henan and along the Yangtze were exploited since prehistoric times and have largely been exhausted; most Chinese jade today is extracted from the northwestern province of Xinjiang.
Sierra de las Minas is a mountain range in eastern Guatemala, extending 130 km west of the Lake Izabal. It is 15–30 km wide and bordered by the valleys of the rivers Polochic in the north and the Motagua in the south. Its western border is marked by the Salamá River valley which separates it from the Chuacús mountain range. The highest peak is Cerro Raxón at 3,015 m. The Sierra's rich deposits of jade and marble have been mined throughout the past centuries. These small scale mining activities also explain the name of the mountain range.
Greenstone is a common generic term for valuable, green-hued minerals and metamorphosed igneous rocks and stones which early cultures used in the fashioning of hardstone carvings such as jewelry, statuettes, ritual tools, and various other artifacts. Greenstone artifacts may be made of greenschist, chlorastrolite, serpentine, omphacite, chrysoprase, olivine, nephrite, chloromelanite among other green-hued minerals. The term also includes jade and jadeite, although these are perhaps more frequently identified by these latter terms. The greenish hue of these rocks generally derives from the presence of minerals such as chlorite, hornblende, or epidote.
Hardstone carving is a general term in art history and archaeology for the artistic carving of predominantly semi-precious stones, such as jade, rock crystal, agate, onyx, jasper, serpentinite, or carnelian, and for an object made in this way. Normally the objects are small, and the category overlaps with both jewellery and sculpture. Hardstone carving is sometimes referred to by the Italian term pietre dure; however, pietra dura is the common term used for stone inlay work, which causes some confusion.
The Jadeite Cabbage or Jadeite Cabbage with Insects is a piece of jadeite carved into the shape of a Chinese cabbage head, and with a locust and katydid camouflaged in the leaves. It is part of the collection of the National Palace Museum in Taipei, Taiwan.
The jade trade in Myanmar consists of the mining, distribution, and manufacture of jadeite—a variety of jade—in the nation of Myanmar (Burma). The jadeite deposits found in Myanmar's northern regions are the source of the highest quality jadeite in the world, noted by sources in China going as far back as the 10th century. Chinese culture places significant weight on the meaning of jade; as their influence has grown in Myanmar, so has the jade industry and the practice of exporting the precious mineral.
Philippine jade Culture or Jade Artifacts, made from white and green nephrite and dating as far back as 2000–1500 BC, have been discovered at a number of archeological excavations in the Philippines since the 1930s. The artifacts have been both tools like chisels, and ornaments such as lingling-o earrings, bracelets and beads.
Waipounamu Māori are a group of Māori iwi at or around the South Island of New Zealand. It includes the iwi (tribe) of Ngāi Tahu and the historical iwi of Kāti Māmoe, who occupy the island except for its most northern districts. It also includes Te Tau Ihu Māori iwi, such as Ngāti Toa, Te Atiawa o Te Waka-a-Māui, Ngāti Apa ki te Rā Tō, Rangitāne, Ngāti Kuia, Ngāti Rārua, Ngāti Kōata and Ngāti Tama.
Lingling-o or ling-ling-o, is a type of penannular or double-headed pendant or amulet that has been associated with various late Neolithic to late Iron Age Austronesian cultures. Most lingling-o were made in jade workshops in the Philippines, and to a lesser extent in the Sa Huỳnh culture of Vietnam, although the raw jade was mostly sourced from Taiwan.
Pounamu is a term for several types of hard and durable stone found in southern New Zealand. They are highly valued in New Zealand, and carvings made from pounamu play an important role in Māori culture.
Yupei is a generic term for jade pendants. Yupei were popular even before Confucius was born. Jade culture is an important component of Chinese culture, reflecting both the material and spiritual culture. Jade is deeply ingrained in Chinese culture and played a role in every aspect of social life; it is also associated with positive qualities and aspects such as purity, excellence, and harmony.Jade is even more valued than gold in Chinese culture. The history of the art of jade carving in China to make ornaments, including dress ornaments, extends back to before 5000 BC. Ancient Chinese held even greater importance to yupei after it was regarded as a moral integrity by Confucius. Yupei could be used as belt or waist ornaments and as necklaces which appeared as early as the Liangzhu culture. Strings of jade pendant are also used to decorate headwear, such as the mianguan.