Jade use in Mesoamerica

In general terms, jade refers to two distinct minerals: nephrite, a calcium- and magnesium-rich amphibole mineral, and jadeite, a pyroxene rich in sodium and aluminum. A general misconception is that nephrite does not naturally exist in Mesoamerica. However, the Middle Motagua River Valley area that yields jadeite also yields nephrite, although Mesoamerican artisans had less interest in working nephrite. Colloquially 'jade' objects in Mesoamerica are composed of jadeite, but may also refer to other similar-looking, relatively hard greenstones such as albitite, omphacite, chrysoprase, and quartzite. Variation in color is largely due to variation in trace element composition. In other words, the types of trace elements and their quantities affect the overall color of the material. “Olmec Blue” jade, characterized by an icelike shade of pale blue, owes its unique color to the presence of iron and titanium, while the more typical green jade's color is due to the varying presence of sodium, aluminum, iron, and chromium. Translucence can vary as well, with specimens ranging from nearly clear to completely opaque. ==Sources in Mesoamerica==

The archaeological search for the Mesoamerican jade sources, which were largely lost at the time of the Maya collapse, began in 1799 when Alexander von Humboldt started his geological research in the New World. Von Humboldt sought to determine whether or not Neolithic jadeite celts excavated from European Megalithic archaeological sites like Stonehenge and Carnac shared sources with the similar looking jade celts from Mesoamerica (they do not). The first discovery of in-situ jade quarries has been attributed by some to archeologist Mary Lou Ridinger in 1974. However, in 1952, the first documented discovery of in-situ jadeite in a pre-Columbian Maya jadeite quarry was made by Robert E. Leslie in the Motagua River valley near Manzanal, Guatemala, as documented in a 1955 publication co-authored by Leslie with William F. Foshag, who, at the time, was Head Curator of the Smithsonian Institution Department of Geology. Since her first discovery, Ridinger also discovered many varieties of Central American jadeite that had never before been seen, such as lilac jade and a variety of jadeite with pyrite inclusions. From 1974 to 1996, the only documented source of jadeite in Mesoamerica was the lowland Motagua River valley. Research conducted by the Mesoamerican Jade Project of Harvard's Peabody Museum of Archaeology & Ethnology between 1977 and 2000 led to the identification of both the long lost 'Olmec Blue' mines, a discovery published by Mesoamerican Jade project Field Director Russell Seitz and his colleagues from the American Museum of Natural History in Antiquity in December 2001. In addition, they conducted geochemical dating of several ancient Maya lode mines and alluvial sources in the mountainous areas on both sides of the Motagua. Following their exposure by the torrential rains of Hurricane Mitch in 1998, alluvial cobbles of blue jade were traced up a southern Motagua tributary, the Rio Tambor, to massive outcrops of fine grained translucent 'Olmec Blue' jadeite, at elevations of between 1200 and 3800 feet in the province of Jalapa, along a fault extending from Carrizal Grande to La Ceiba. Geochemical dating revealed that the southern deposits, including the archaeologically important translucent blue jade, were ~40 MA older that the coarse grained opaque jades mined for sale to tourists, or those from the higher elevations around a northern Motagua tributary, the Rio Blanco, where jadeite outcrops are found at elevations of up to an elevation of 6,000 feet and several of the ancient mining sites are connected by dry-laid stone paths. It is noteworthy that the richest 'Olmec Blue' source area, far from being in 'the Motagua Valley' lies about 50 km southwest of Copán. Since the Motagua River becomes Guatemala's border with Honduras, Honduras may host alluvial jade as well. The rediscovered 'Olmec' jade is of the quality traded throughout formative Mesoamerica, reaching areas as distant as the Valley of Mexico and Costa Rica. While Pool notes that "for many years, it had been suggested that there might be another source in the Balsas River valley", no such Mexican source has come to light; However, recent work has revealed that the high pressure-low temperature metamorphic rocks (blueschist facies) hosting jade deposits in Guatemala also outcrop as jadeite boulder bearing serpentine melange deposits at several places in Cuba and Hispaniola, where the material was exploited by the Taino and Carib cultures. Jade artifacts, mainly pointed celts, apparently stemming from these Antillean sources have been excavated as far east as Antigua in the Windward Islands. Given the scope and duration of the regional tectonic processes that created and exhumed these jade deposits, they may well extend into Chiapas as well. However, one of the five islands in the chain known as Isla de Bahias, i.e., Bay Island, is not only rich in green Jadeite and some blue as well, but there is a beach aptly called Jade Beach with approximately fifty-foot walls of Jadeite. Barbaretta is sandwiched between Guanaha to the east and Morat, Roatan, and Utila to the west. The beach is covered with well-polished stones. == Uses ==

Art Jade was shaped into a variety of objects including, but not limited to, figurines, celts, ear spools (circular earrings with a large hole in the center), and teeth inlays (small decorative pieces inserted into the incisors). Mosaic pieces of various sizes were used to decorate belts and pectoral coverings. A good example of jadeite garb is the Maya Leiden Plaque. The plaque was known more as a portable stella, with hieroglyphs and narratives inscribed on its face. The markings provide a scene of a Maya lord standing with one foot on top of a captive. The aesthetic and religious significance of the various colors remains a source of controversy and speculation. The bright green varieties may have been identified with the young Maize God. The Olmec were fascinated with the unique blue jade of Guatemala and it played an important role in their rituals involving water sources. The Olmec used blue jade because it represented water, an Olmec iconography representing the Underworld. Blue also represented the blue color that snakes turn before shedding their skin; therefore, blue represents aquatic and serpentine rejuvenation. In Aztec religion, the symbolic system of jade contributed deities to denote their roles and characteristics. For instance, since jade has similar color and brilliance to water, it metaphorically symbolizes water. Also, a necklace with jade as well as a skirt represents femininity. Thus, jade on the Aztec goddess of water, Chalchiuhtlicue, suggests both femininity and her role on water. ==Working jade==

Next to emery, jade was the hardest mineral known to ancient Mesoamerica. In the absence of metal tools, ancient craftsmen used tools themselves made of jade, leather strops, string saws to cut and carve jade, and reeds or other hard materials to drill holes. Working the raw stone into a finished piece was a very labor-intensive process, often requiring repeated physical movement to shape the jade. It would take many hours of work to create even a single jade bead. Craftsmen employed lapidary techniques such as pecking, percussion, grinding, sawing, drilling, and incising to shape and decorate jade. Several of these techniques were thought to imbue pieces with religious or symbolic meaning. For instance, drilling holes into jade was thought to give a piece "life," or animate, a carving. In addition to being an elite good of highly symbolic use in the performance of ideological ritual, the high pressure minerals that form these translucent rocks are much tougher and more damage resistant than slightly harder but far more brittle materials such as flint. ==See also==