See also:

• JARGOON, or JARGON (occasionally in old writings jargounce and jacounce)

JARGOON, or See also:

• JARGON

JARGON (occasionally in old writings jargounce and jacounce)  , a name applied by See also:

• MODERN

modern mineralogists to those zircons which are See also:

• FINE

fine enough to be cut as See also:

• GEM (Lat. gemma, a bud,—from the root gen, meaning " to produce,"—or precious stone; in the latter sense the Greek term is > d>os)
• GEM, ARTIFICIAL

gem-stones, but are not of the red See also:

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

colour which characterizes the See also:

• HYACINTH (Gr. ualavOor)
• HYACINTH, or JACINTH

hyacinth or jacinth . The word is related to Arab zargun (See also:

• ZIRCON

zircon) . Some of the finest jargoons are See also:

• GREEN, A
• GREEN, ALEXANDER HENRY (1832—1896)
• GREEN, DUFF (1791—1875)
• GREEN, JOHN RICHARD (1837—1883)
• GREEN, MATTHEW (1696-1737)
• GREEN, THOMAS HILL (1836-1882)
• GREEN, VALENTINE (1739–1813)
• GREEN, WILLIAM HENRY (.1825–1900)

green, others 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 and yellow, whilst some are colourless . The colourless See also:

• JARGOON, or JARGON (occasionally in old writings jargounce and jacounce)

jargoon may be obtained t y See also:

• HEATING

heating certain coloured stones . When zircon is heated it sometimes changes in colour, or altogether loses it, and at the same 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 usually increases in See also:

• DENSITY (Lat. densus, thick)

density and brilliancy . The so-called Matura diamonds, formerly sent from Matara (or Matura), in See also:

• CEYLON

Ceylon, were decolorized zircons . The zircon has strong refractive See also:

• POWER [WILLIAM GRATTAN] TYRONE (1797-1841)

power, and its lustre is almost adamantine, but it lacks the See also:

• FIRE (in O. Eng. f j'r; the word is common to West German languages, cf. Dutch vuur, Ger. Feuer; the pre-Teutonic form is seen in Sanskrit pu, pavaka, and Gr. irup; the ultimate origin is usually taken to be a root meaning to purify, cf. Lat. purus)

fire of the See also:

• DIAMOND

diamond . The specific gravity of zircon is subject to considerable variation in different varieties; thus See also:

• SIR

Sir A . H . See also:

• CHURCH
• CHURCH (according to most authorities derived from the Gr. Kvpcaxov [&wµa], " the Lord's [house]," and common to many Teutonic, Slavonic and other languages under various forms—Scottish kirk, Ger. Kirche, Swed. kirka, Dan. kirke, Russ. tserkov, Buig. cerk
• CHURCH, FREDERICK EDWIN (1826-1900)
• CHURCH, GEORGE EARL (1835–1910)
• CHURCH, RICHARD WILLIAM (1815–189o)
• CHURCH, SIR RICHARD (1784–1873)

Church found the sp. gr. of a fine See also:

• LEAF (O. Eng. leaf, cf. Dutch loof, Ger. Laub, Swed. lof, &c.; possibly to be referred to the root seen in Gr. Ma-eta, to peel, strip)

leaf-green jargoon to be as See also:

• LOW, SETH (1850- )
• LOW, WILL HICOK (1853- )

low as 3.982, and that of a pure 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 jargoon as high as 4.705 . Jargoon and See also:

• TOURMALINE

tourmaline, when cut as gems, are sometimes mistaken for each other, but the sp. gr. is distinctive, since that of tourmaline is only 3 to 3.2 . Moreover, in tourmaline the dichroism is strongly marked, whereas in jargoon it is remarkably feeble .

The refractive indices of jargoon are much higher than those of tourmaline (see ZIRCON) . (F . W .