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Alabaster

Alabaster is a soft rock used for carvings and as a source of plaster powder. Archaeologists, geologists, and the stone industry have different definitions for the word alabaster. In archaeology, the term alabaster includes objects and artefacts made from two different minerals: (i) the fine-grained, massive type of gypsum, and (ii) the fine-grained, banded type of calcite.

Etymology
, Spain (built 13th–16th centuries) The English word "alabaster" was borrowed from Old French ', in turn derived from Latin ', and that from Greek ' (') or ' ('). The Greek words denoted a vase of alabaster. The name may be derived further from ancient Egyptian '', which refers to vessels of the Egyptian goddess Bast. She was represented as a lioness and frequently depicted as such in figures placed atop these alabaster vessels. Ancient Roman authors Pliny the Elder and Ptolemy wrote that the stone used for ointment jars called alabastra'' came from a region of Egypt known as Alabastron or Alabastrites. ==Properties and usability==
Properties and usability
The purest alabaster is a snow-white material of fine uniform grain, but it often is associated with an oxide of iron, which produces brown clouding and veining in the stone. The coarser varieties of gypsum alabaster are converted by calcination into plaster of Paris, and are sometimes known as "plaster stone". The finer kinds of alabaster are employed largely as an ornamental stone, especially for ecclesiastical decoration and for the rails of staircases and halls. In contemporary applications, Egyptian calcite alabaster is still utilized by local artisans who employ traditional hand-carving methods. Due to its natural translucency, the stone is frequently shaped into decorative objects and lighting fixtures, such as lampshades and candle holders, allowing it to remain a relevant material in modern interior design. ==Modern processing==
Modern processing
in Tuscany, Italy Working techniques Alabaster is mined and then sold in blocks to alabaster workshops. There they are cut to the needed size ("squaring"), and then are processed in different techniques: turned on a lathe for round shapes, carved into three-dimensional sculptures, chiselled to produce low relief figures or decoration; and then given an elaborate finish that reveals its transparency, colour, and texture. For this the stone needs to be fully immersed in various pigment solutions and heated to a specific temperature. The technique can be used to disguise alabaster. In this way an imitation of coral that is called "alabaster coral" is produced. ==Types, occurrence, history==
Types, occurrence, history
, d. 1323 BC Typically only one type is sculpted in any particular cultural environment, but sometimes both have been worked to make similar pieces in the same place and time. This was the case with small flasks of the alabastron type made in Cyprus from the Bronze Age into the Classical period. Window panels When cut into thin sheets, alabaster is translucent enough to be used for small windows. It was used for this purpose in Byzantine churches and later in medieval ones, especially in Italy. Large sheets of Aragonese gypsum alabaster are used extensively in the Cathedral of Our Lady of the Angels, The cathedral incorporates special cooling to prevent the panes from overheating and turning opaque. while the modern Los Angeles cathedral employs gypsum alabaster. There are also multiple examples of alabaster windows in ordinary village churches and monasteries in northern Spain. Calcite alabaster Calcite alabaster, harder than the gypsum variety, was used in ancient Egypt and the wider Middle East (except Assyrian palace reliefs), and also in modern times. It is found as either a stalagmitic deposit from the floor and walls of limestone caverns, or as a kind of travertine, similarly deposited in springs of calcareous water. Its deposition in successive layers gives rise to the banded appearance that the marble often shows on cross-section, from which its name is derived: onyx-marble or alabaster-onyx, or sometimes simply (and wrongly) as onyx. North America In Mexico, there are famous deposits of a delicate green variety at La Pedrara, in the district of Tecali, near Puebla. Onyx-marble occurs also in the district of Tehuacán and at several localities in the US including California, Arizona, Utah, Colorado and Virginia. In Mesopotamia, gypsum alabaster was the material of choice for figures of deities and devotees in temples, as in a figure believed to represent the deity Abu dating to the first half of the 3rd millennium BC, which is kept in New York. Aragon, Spain Much of the world's alabaster is extracted from the centre of the Ebro Valley in Aragon, Spain, which has the world's largest known exploitable deposits. According to a brochure published by the Aragon government, alabaster has elsewhere either been depleted, or its extraction is so difficult that it has almost been abandoned or is carried out at a very high cost. During the Middle Ages the craft of alabaster was almost completely forgotten. In the 17th and 18th centuries production of artistic, high-quality Renaissance-style artifacts stopped altogether, replaced by less sophisticated, cheaper items better suited for large-scale production and commerce. The new industry prospered, but the reduced need for skilled craftsmen left few of them still working. The 19th century brought a boom to the industry, largely due to the "traveling artisans" who offered their wares to the palaces of Europe, as well as to America and the East. England and Wales , typical Nottingham alabaster panel from an altarpiece set, 1450–1490, showing remnants of its painted decoration. Walters Art Museum, Baltimore Gypsum alabaster is a common mineral, which occurs in England in the Keuper marls of the Midlands, especially at Chellaston in Derbyshire, at Fauld in Staffordshire, and near Newark in Nottinghamshire. Deposits at all of these localities have been worked extensively. In the 14th and 15th centuries the carving into small statues and sets of relief panels for altarpieces was a valuable local industry in Nottingham, as well as a major English export. These were usually painted, or partly painted. It was also used for the effigies, often life size, on tomb monuments, as the typical recumbent position suited the material's lack of strength, and it was cheaper and easier to work than good marble. After the English Reformation the making of altarpiece sets was discontinued, but funerary monument work in reliefs and statues continued. In addition to the carvings still in Britain (particularly the Nottingham Castle Museum, British Museum, and Victoria and Albert Museum), trade in mineral alabaster (other than the antiques trade) is ongoing as far afield as the Musée de Cluny, Spain, and Scandinavia. Alabaster is also found, in smaller quantity, at Watchet in Somerset, near Penarth in Glamorganshire, and elsewhere. In Cumbria it occurs largely in the New Red rocks, but at a lower geological horizon. The alabaster of Nottinghamshire and Derbyshire is found in thick nodular beds or "floors" in spheroidal masses known as "balls" or "bowls" and in smaller lenticular masses termed "cakes". At Chellaston, where the local alabaster is known as "Patrick", it has been worked into ornaments under the name of "Derbyshire spar"―a term more properly applied to fluorspar. , Rijksmuseum Black alabaster Black alabaster is a rare anhydrite form of the gypsum-based mineral. The black form is found in only three veins in the world, one each in United States, Italy, and China. Alabaster Caverns State Park, near Freedom, Oklahoma, is home to a natural gypsum cave in which much of the gypsum is in the form of alabaster. There are several types of alabaster found at the site, including pink, white, and the rare black alabaster. Gallery Ancient and Classical Near East Ebih-Il Louvre AO17551 n01.jpg|Statue of Ebih-Il, Mari on the Euphrates, made of gypsum alabaster (25th century BC) File:Statuette_Goddess_Louvre_AO20127.jpg|Necropolis of Hillah, near Babylon. Alabaster, gold, terracotta and rubies. Musée du Louvre Statue Ammaalay Louvre AO20282.jpg|Alabaster statue, Yemen (1st century BC) File:Assyrian royal lion Hunt19.JPG|Assyrian relief; King Ashurbanipal spears a lion European Middle Ages Norbury, Derbyshire - Nicholas Fitzherbert.jpg|Alabaster sepulchral monument of Nicholas Fitzherbert, d. AD 1473, in St Mary and St Barlock's Church, Norbury, Derbyshire, England File:Fossanova Abbey fc02.jpg|Alabaster windows in the choir of Fossanova Abbey church (12th century) in Latina, Italy File:Casamari coro.jpg|Alabaster windows and rosette in the central apse of Casamari Abbey church (1203–1217) in Lazio, Italy File:Orvieto083.jpg|Alabaster window in Orvieto Cathedral (14th century), Italy Modern Archaizing Relief of a Seated King and Attendants, late 19th century.jpg|Archaizing Relief of a Seated King and Attendants, Iran, Qajar period (late 19th century CE, in the style of 5th–4th century BC). Brooklyn Museum. Alabasterlampe Umgang Oktogon erleuchtet.jpg|Alabaster lamp, Aachen Cathedral, Germany (early 20th century) alabaster-satin spar.jpg|Objet d'art with gypsum alabaster base, showing typical mottling (modern) ==See also==
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