NAPOLEONITE  , also called Corsite because 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 is found in the See also:

• ISLAND (O.E. ieg =isle, +land')

island of See also:

• CORSICA (Fr. Corse)

Corsica, a variety of See also:

• DIORITE (from the Gr. S&oi4eiv to distinguish, from hA through, Epos, a boundary)

diorite which is characterized by orbicular structure . The See also:

• GREY, CHARLES GREY, 2ND EARL (1764-1845)
• GREY, HENRY GREY, 3RD EARL (1802-1894)
• GREY, LADY JANE (1537-1554)
• GREY, SIR EDWARD
• GREY, SIR GEORGE (1812–1898)

grey See also:

• MATRIX

matrix of the stone has the normal See also:

• APPEARANCE (from Lat. apparere, to appear)

appearance of a diorite, but contains many rounded lumps 1 or 2 in. in See also:

• DIAMETER (from the Cr. &a, through, µErpov, measure)

diameter, which show concentric zones of See also:

• LIGHT

light and dark See also:

• COLOURS, MILITARY

colours . In these spheroids also a distinct and well-marked radial arrangement of the crystals is apparent . The centre of the See also:

• SPHEROID (Gr. c4aipa-etbis, like a sphere)

spheroid is usually 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 See also:

• PALE (through Fr. pal, from Lat. palms, a stake, for paglus, from the stem pag- of pangere, to fix; " pole " is from the same original source)

pale grey and consists mainly of See also:

• FELSPAR, or FELDSPAR

felspar; the same See also:

• MINERAL

mineral makes the pale zones while the dark ones are See also:

• RICH, BARNABE (c. 1540-1617)
• RICH, CLAUDIUS JAMES (1787-1821)
• RICH, JOHN (1692-1761)
• RICH, PENELOPE, LADY (c. 1562–1607)
• RICH, RICHARD, 1ST BARON RICH (1490?-1567)

rich in See also:

• HORNBLENDE

hornblende and See also:

• PYROXENE

pyroxene . The felspar is a basic variety of See also:

• PLAGIOCLASE

plagioclase (See also:

• ANORTHITE

anorthite or See also:

• BYTOWNITE

bytownite) . Though mostly rounded, the spheroids may be elliptical or subangular; sometimes they are in contact with one another but usually they are separated by small areas of massive diorite . When cut and polished the 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 makes a beautiful and striking ornamental stone . It has been used for making See also:

• PAPER
• PAPER (Fr. papier, from Lat. papyrus)

paper-weights and other small ornamental articles . Spheroidal structure is found in other diorites and in quite a number of granites in various places, such as See also:

• SWEDEN
• SWEDEN [Sverige]
• SWEDEN, NORWAY AND

Sweden, See also:

• RUSSIA
• RUSSIA (Rossiya)

Russia, See also:

• AMERICA

America, See also:

• SARDINIA (Gr. 'IXs'o"uva, from a fancied resemblance to a footprint in its shape, Ital. Sardegna)

Sardinia, See also:

• IRELAND
• IRELAND, CHURCH
• IRELAND, CHURCH OF
• IRELAND, JOHN (1761-1842)
• IRELAND, JOHN (1838- )
• IRELAND, WILLIAM HENRY (1777-1835)

Ireland . It is by no means See also:

• COMMON

common, however, and usually occurs in only a small See also:

• PART

part of a granitic or dioritic See also:

• MASS (O.E. maesse; Fr. messe; Ger. Messe; Ital. messa; from eccl. Lat. missa)
• MASS, IN

mass, being sometimes restricted to an See also:

• AREA

area of a few square yards . In most cases it is found near the centre of the outcrop, though exceptionally it has been found quite See also:

• CLOSE
• CLOSE (from Lat. clausum, shut)
• CLOSE, MAXWELL HENRY (1822-1903)

close to the margin . It arises evidently from intermittent and repeated See also:

• CRYSTALLIZATION

crystallization of the rock-forming minerals in successive stages .

Such a See also:

• PROCESS

process would be favoured by See also:

• COMPLETE

complete See also:

• REST (O. Eng. rest, reste, bed, cognate with other Teutonic forms, e.g. Ger. Rast, Riiste, rest, and probably Gothic Rasta, league, i.e. resting or stopping place)

rest, which would allow of supersaturation of the magma by one of the components . Rapid crystallization would follow, producing deposits on any suitable nuclei, and the crystals then formed might have a radial disposition on the surfaces on which they See also:

• GREW, NEHEMIAH (1641-1712)

grew . The magma might then be greatly impoverished in this particular substance, and another See also:

• DEPOSIT (Lat. depositurn, from deponere, to lay down, to put in the care of)

deposit of a different See also:

• KIND (O. E. ge-cynde, from the same root as is seen in " kin," supra)

kind would follow, producing a See also:

• ZONE (Gr. 'WV77, a girdle, from 'wvvLvay to gird)

zone of different See also:

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

colour . The See also:

• NUCLEUS (Lat. for the kernal of a nut, nux, the stone of fruit)

nucleus for the spheroidal growth is sometimes an See also:

• EARLY
• EARLY, JUBAL ANDERSON (1816-1894)

early porphyritic crystal, sometimes an enclosure of See also:

• GNEISS

gneiss, &c., and often does not differ essentially in See also:

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

composition from the surrounding rock . When spheroids are in contact the%r inner zones may be distinct while the See also:

• OUTER

outer ones are common to both individuals having the outlines of a figure of eight . This proves that growth was centrifugal, not centripetal . Many varieties of spheroids are described presenting See also:

• GREAT

great See also:

• DIFFERENCES, CALCULUS OF (Theory of Finite Differences)

differences in composition and in structure . Some are merely rounded balls consisting of the earliest minerals of the rock, such as See also:

• APATITE

apatite, See also:

• ZIRCON

zircon, See also:

• BIOTITE

biotite and hornblende, and possessing no See also:

• REGULAR

regular arrangement . Others have as centres a See also:

• FOREIGN

foreign fragment such as gneiss or See also:

• HORNFELS (a German word meaning hornstone)

hornfels, with one or more zones, pale or dark, around this . Radial arrangement of the crystals, though often • very perfect, is by no means universal . The spheroids are sometimes flattened or See also:

• EGG (O.E. aeg, cf. Ger. Ei, Swed. aegg, and prob. Gr. u,ov, Lat. ovum)
• EGG, AUGUSTUS LEOPOLD (1816-1863)

egg-shaped, apparently by fluxion movements of the magma at a See also:

• TIME (0. Eng. Lima, cf. Icel. timi, Swed. timme, hour, Dan. time; from the root also seen in " tide," properly the time of between the flow and ebb of the sea, cf. O. Eng. getidan, to happen, " even-tide," &c.; it is not directly related to Lat. tempus)
• TIME, MEASUREMENT OF
• TIME, STANDARD

time when they were semi-solid or plastic . As a See also:

• GENERAL
• GENERAL (Lat. generalis, of or relating to a genus, kind or class)

general See also:

• RULE

rule the spheroids are more basic and richer in the ferromagnesian minerals than the surrounding rock, though some of the zones are often very rich in See also:

• QUARTZ

quartz and felspar .

Graphic or perthitic intergrowths between the minerals of a zone are frequent . The spheroids vary in width up to 1 or 2 ft . In some cases they contain abnormal constituents such as See also:

• CALCITE

calcite, See also:

• SILLIMANITE

sillimanite or See also:

• CORUNDUM

corundum, (J . S .