ALABASTER
, a name applied to two distinct See also:mineral sub-stances, the one a hydrous sulphate of See also:lime and the other a carbonate of lime
.
The former is the alabaster of the See also:present See also:day, the latter is generally the alabaster of the ancients
.
The two kinds are readily distinguished from each other by their relative hardness
.
The See also:modern alabaster is so soft as to be readily scratched even by the See also:finger-See also:nail (hardness =1.5 to 2), whilst the See also:- STONE
- STONE (0. Eng. shin; the word is common to Teutonic languages, cf. Ger. Stein, Du. steen, Dan. and Swed. sten; the root is also seen in Gr. aria, pebble)
- STONE, CHARLES POMEROY (1824-1887)
- STONE, EDWARD JAMES (1831-1897)
- STONE, FRANK (1800-1859)
- STONE, GEORGE (1708—1764)
- STONE, LUCY [BLACKWELL] (1818-1893)
- STONE, MARCUS (184o— )
- STONE, NICHOLAS (1586-1647)
stone called alabaster by the ancients is too hard to be scratched in this way (hardness=3), though it yields readily to a See also:knife
.
Moreover, the See also:ancient alabaster, being a carbonate, effervesces on being touched with hydrochloric See also:acid, whereas the modern alabaster when so treated remains practically unaffected
.
Ancient Alabaster.—This substance, the " alabaster " of scripture, is often termed See also:Oriental alabaster, since the See also:early examples came from the See also:East
.
The See also:Greek name hXaf3avrpirr7s is said to be derived from the See also:town of Alabastron, in See also:Egypt, where the stone was quarried, but the locality probably owed its name to the mineral; the origin of the mineral-name is obscure, and it has been suggested that it may have had an Arabic origin
.
The Oriental alabaster was highly esteemed for making small perfume-bottles or ointment vases called alabastra; and this has been conjectured to be a possible source of the name
.
Alabaster was also employed in Egypt for Canopic jars and various other sacred and sepulchral See also:objects
.
A splendid See also:sarcophagus, sculptured in a single See also:block of translucent Oriental alabaster from Alabastron, is in the See also:Soane Museum, See also:London
.
This was discovered by Giovanni See also:Belzoni, in 1817, in the See also:tomb of Seti I., near See also:Thebes, and was See also:purchased by See also:Sir See also:John Soane, having previously been offered to the See also:British Museum for £2000
.
Oriental alabaster is either a stalagmitic See also:deposit, from the See also:floor and walls of See also:limestone-caverns, or a See also:kind of travertine, deposited from springs of calcareous See also:water
.
Its deposition in successive layers gives rise to the banded See also:appearance which the See also:marble often shows on See also:cross-See also:section, whence it is known as See also:onyx-marble or alabaster-onyx, or sometimes simply as onyx—a See also:term which should, however, be restricted to a siliceous mineral
.
The See also:Egyptian alabaster has been extensively worked near Suef and near See also:Assiut; there are many ancient quarries in the hills overlooking the See also:plain of Tell el Amarna
.
The Algerian onyx-marble has been largely quarried in the See also:province of See also:Oran
.
In See also:Mexico there are famous deposits of a delicate See also:green variety at La Pedrara, in the See also:district of Tecali, near See also:Puebla
.
Onyx-marble
occurs also in the district of Tehuacan and at several localities in See also:California, See also:Arizona, See also:Utah, See also:Colorado and See also:Virginia
.
Modern Alabaster.—When the term " alabaster " is used without any qualification it invariably means, at the present day, a finely granular variety of See also:gypsum (q.v.)
.
This mineral, or alabaster proper, occurs in See also:England in the See also:Keuper marls of the Midlands, especially at Chellaston in See also:Derbyshire, at Fauld in See also:Staffordshire and near See also:Newark in See also:Nottinghamshire
.
At all these localities it has been extensively worked
.
It is also found, though in subordinate quantity, at Watchet in See also:Somersetshire, near See also:Penarth in See also:Glamorganshire, and elsewhere
.
In See also:Cumberland and See also:Westmorland it occurs largely in the New Red rocks, but at a See also:lower See also:geological See also:horizon
.
The alabaster of See also:Nottingham-See also:shire and Derbyshire is found in thick nodular beds or " floors," in spheroidal masses known as " balls " or " See also:bowls," and in smaller lenticular masses termed " cakes." At Chellaston, where the alabaster is known as " See also:Patrick," it has been worked into ornaments under the name of " Derbyshire spar "—a term applied also to fluor-spar
.
The finer kinds of alabaster are largely employed as an ornamental stone, especially for ecclesiastical decoration, and for the walls of staircases and halls
.
Its softness enables it to be readily carved into elaborate forms,
but its solubility in water renders it inapplicable to outdoor See also:work
.
The purest alabaster is a See also:snow-See also:- WHITE
- WHITE, ANDREW DICKSON (1832– )
- WHITE, GILBERT (1720–1793)
- WHITE, HENRY KIRKE (1785-1806)
- WHITE, HUGH LAWSON (1773-1840)
- WHITE, JOSEPH BLANCO (1775-1841)
- WHITE, RICHARD GRANT (1822-1885)
- WHITE, ROBERT (1645-1704)
- WHITE, SIR GEORGE STUART (1835– )
- WHITE, SIR THOMAS (1492-1567)
- WHITE, SIR WILLIAM ARTHUR (1824--1891)
- WHITE, SIR WILLIAM HENRY (1845– )
- WHITE, THOMAS (1628-1698)
- WHITE, THOMAS (c. 1550-1624)
white material of See also:fine See also:uniform See also:grain, but it is often associated with See also:oxide of See also:iron, which produces See also:- BROWN
- BROWN, CHARLES BROCKDEN (1771-181o)
- BROWN, FORD MADOX (1821-1893)
- BROWN, FRANCIS (1849- )
- BROWN, GEORGE (1818-188o)
- BROWN, HENRY KIRKE (1814-1886)
- BROWN, JACOB (1775–1828)
- BROWN, JOHN (1715–1766)
- BROWN, JOHN (1722-1787)
- BROWN, JOHN (1735–1788)
- BROWN, JOHN (1784–1858)
- BROWN, JOHN (1800-1859)
- BROWN, JOHN (1810—1882)
- BROWN, JOHN GEORGE (1831— )
- BROWN, ROBERT (1773-1858)
- BROWN, SAMUEL MORISON (1817—1856)
- BROWN, SIR GEORGE (1790-1865)
- BROWN, SIR JOHN (1816-1896)
- BROWN, SIR WILLIAM, BART
- BROWN, THOMAS (1663-1704)
- BROWN, THOMAS (1778-1820)
- BROWN, THOMAS EDWARD (1830-1897)
- BROWN, WILLIAM LAURENCE (1755–1830)
brown clouding and veining in the stone
.
The coarser varieties of alabaster are converted by calcination into See also:plaster of See also:Paris, whence they are sometimes known as " plaster stone."
On the See also:continent of See also:Europe the centre of the alabaster See also:trade is See also:Florence
.
The Tuscan alabaster occurs in nodular masses, embedded in limestone, interstratified with marls of See also:Miocene and See also:Pliocene See also:age
.
The mineral is largely worked, by means of underground galleries, in the district of See also:Volterra
.
Several varieties are recognized—veined, spotted, clouded, agatiform, &c
.
The finest kind, obtained principally from Castellina, is sent to Florence for figure-See also:sculpture, whilst the See also:common kinds are carved locally, at a very cheap See also:rate, into vases, See also:clock-cases and various ornamental objects, in which a large trade is carried on, especially in Florence, See also:Pisa and See also:Leghorn
.
In See also:- ORDER
- ORDER (through Fr. ordre, for earlier ordene, from Lat. ordo, ordinis, rank, service, arrangement; the ultimate source is generally taken to be the root seen in Lat. oriri, rise, arise, begin; cf. " origin ")
- ORDER, HOLY
order to diminish the translucency of the alabaster and to produce an opacity suggestive of true marble, the statues are immersed in a See also:bath of water and gradually heated nearly to the boilingpoint—an operation requiring See also:great care, for if the temperature be not carefully regulated, the stone acquires a dead-white chalky appearance
.
The effect of See also:heating appears to be a partial dehydration of the gypsum
.
If properly treated, it very closely resembles true marble, and is known as marine di Castellina
.
It should be noted that sulphate of lime (gypsum) was used also by the ancients, and was employed, for instance, in See also:Assyrian sculpture, so that some of the ancient alabaster is identical with the modern stone
.
Alabaster may be stained by digesting it, after being heated, in various pigmentary solutions; and in this way a See also:good See also:imitation of See also:coral has been produced (alabaster coral)
.
See M
.
See also:Carmichael, See also:Report on the Volterra Alabaster See also:Industry, See also:Foreign See also:- OFFICE (from Lat. officium, " duty," " service," a shortened form of opifacium, from facere, " to do," and either the stem of opes, " wealth," " aid," or opus, " work ")
Office, See also:Miscellaneous See also:Series, No
.
352 (London, 1895) ; A
.
T
.
See also:Metcalfe, " The Gypsum Deposits of Nottingham and Derbyshire," Transactions of the Federated Institution, vol. xii
.
(1896), p
.
107; J
.
G
.
Goodchild, " The Natural See also:History of Gypsum,", Proceedings of the Geologists' Association, vol. x
.
(1888), p
.
425; See also:George P
.
See also:Merrill, " The Onyx See also:Marbles," Report of the U
.
S
.
See also:National Museum for 1893, P
.
539• (F
.
W
.
End of Article: