SILLIMANITE  , a See also:

• ROCK
• ROCK (O.Fr. rake, Sp. rota, Ital. rocca; possibly from a Lat. form rupica, from rupes, rock)
• ROCK, DANIEL (1799–187t)

rock-forming See also:

• MINERAL

mineral consisting of See also:

• ALUMINIUM (symbol Al; atomic weight 27.0)

aluminium silicate, Al2SiO5 . It has the same percentage chemical See also:

• COMPOSITION
• COMPOSITION (Lat. compositio, from componere, to put together)

composition as See also:

• CYANITE

cyanite (q.v.) and See also:

• ANDALUSITE

andalusite (q.v.), but differs from these in crystalline See also:

• FORM (Lat. forma)

form and See also:

• PHYSICAL

physical characters . It crystallizes in the orthorhombic See also:

• SYSTEM

system and has the form of See also:

• LONG, GEORGE (1800-1879)
• LONG, JOHN DAVIS (1838– )

long, slender needles without terminal planes, which are often aggregated together to form fibrous and compact masses; hence the name fibrolite, which is often employed for this See also:

• SPECIES

species . The name sillimanite is after See also:

• BENJAMIN
• BENJAMIN, JUDAHPHILIP (1811-1884)

Benjamin See also:

• SILLIMAN, BENJAMIN (1779-1864)

Silliman the See also:

• ELDER (0. Eng. ellarn; Ger. Holunder; Fr. sureau)
• ELDER (Gr. 1rpev(3iTepos)

elder . There is a perfect cleavage in one direction parallel to the length of the needles . The See also:

• COLOUR (Lat. color, connected with celare, to hide, the root meaning, therefore, being that of a covering)

colour is greyish-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 or brownish, and the lustre vitreous . The hardness is 61 and the specific gravity 3.23 . Sillimanite is a characteristic mineral of gneisses and crystalline See also:

• SCHISTS (Gr. vxq'ecv, to split)

schists, and it is sometimes a product of contact-See also:

• METAMORPHISM (Gr. ise-rci, change of, and liop¢i, shape)

metamorphism . It has been observed at many localities; e.g. in Bohemia (the Faserkiesel of Lindacker, 1792), with See also:

• CORUNDUM

corundum in the Carnatic (fibrolite of See also:

• COMTE, AUGUSTE [ISIDORE AUGUSTE MARIE FRANCOIS XAVIER] (1798-1857)

comte de Bournon, 1802), See also:

• CHESTER
• CHESTER, EARLS OF

Chester in See also:

• CONNECTICUT

Connecticut (sillimanite of G . T . See also:

• BOWEN, CHARLES SYNGE CHRISTOPHER BOWEN, BARON (1835—1894)
• BOWEN, FRANCIS (1811—1890)
• BOWEN, SIR GEORGE FERGUSON (1821—1849)

Bowen, 1824), See also:

• MONROE
• MONROE, JAMES (1758-1831)

Monroe in New See also:

• YORK
• YORK (HOUSE OF)
• YORK, EDMUND OF LANGLEY, DUKE OF (1341-1402)
• YORK, EDWARD
• YORK, FREDERICK AUGUSTUS, DUKE OF (1763-1827)
• YORK, RICHARD, DUKE

York (" monrolite "), Bamle near Brevik in See also:

• NORWAY
• NORWAY (Norge)

Norway (" bamlite ") . Pre-historic implements made of compact sillimanite are found in western See also:

• EUROPE

Europe, and have a certain resemblance to See also:

• JADE
• JADE, or JAHDE

jade implements .

(L . J .