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HYACINTH, or JACINTH

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Originally appearing in Volume V14, Page 25 of the 1911 Encyclopedia Britannica.
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See also:

HYACINTH, or JACINTH , in See also:mineralogy, a variety of See also:zircon (q.v.) of yellowish red See also:colour, used as a See also:gem-See also:stone. The See also:hyacinthus of See also:ancient writers must have been our See also:sapphire, or See also:blue See also:corundum, while the hyacinth of See also:modern mineralogists may have been the stone known as lyncurium (AuyKOU;iiov). The See also:Hebrew word leshem, translated ligure in the Authorized Version (Ex. See also:xxviii. 19), from the X yuprov of the See also:Septuagint, appears in the Revised Version as jacinth, but with a marginal alternative of See also:amber. Both jacinth and amber may be reddish yellow, but their See also:identification is doubtful. As our jacinth (zircon) is not known in ancient See also:Egyptian See also:work, See also:Professor See also:Flinders See also:Petrie has suggested that the leshem may have been a yellow See also:quartz, or perhaps See also:agate. Some old See also:English writers describe the jacinth as yellow, whilst others refer to it as a blue stone, and the hyacinthus of some authorities seems undoubtedly to have been our sapphire. In Rev. xx. 20 the Revised Version retains the word jacinth, but gives sapphire as an alternative. Most of the gems known in See also:trade as hyacinth are only garnets—generally the deep See also:orange-See also:brown hessonite or See also:cinnamon-stoneand many of the See also:antique engraved stones reputed to be hyacinth are probably garnets. The difference may be detected optically, since the See also:garnet is singly and the hyacinth doubly refracting; moreover the specific gravity affords a See also:simple means of diagnosis, that of garnet being only about 3.7, whilst hyacinth may have a See also:density as high as 4.7. Again, it was shown many years ago. by See also:Sir A.

H. See also:

Church that most hyacinths, when examined by the spectroscope, show a See also:series of dark absorption bands, due perhaps to the presence of some rare See also:element such as See also:uranium or See also:erbium. Hyacinth is not a See also:common See also:mineral. It occurs, with other zircons, in the gem-gravels of See also:Ceylon, and very See also:fine stones have been found as pebbles at Mudgee in New See also:South See also:Wales. Crystals of zircon, with all the typical characters of hyacinth, occur at Expailly, Le See also:Puy-en-Velay, in Central See also:France, but they are not large enough for cutting. The stones which have been called Compostella hyacinths are simply ferruginous quartz from See also:Santiago de Compostella in See also:Spain. (F. W.

End of Article: HYACINTH, or JACINTH

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