jacinth

from WordNet (r) 3.0 (2006)

jacinth
    n 1: a red transparent variety of zircon used as a gemstone
         [syn: {hyacinth}, {jacinth}]

from The Collaborative International Dictionary of English v.0.48

Jacinth \Ja"cinth\, n. [F. jacinthe, L. hyacinthus. See
   {Hyacinth}.]
   See {Hyacinth}. --Tennyson.
   [1913 Webster]

from Easton's 1897 Bible Dictionary

Jacinth
properly a flower of a reddish blue or deep purple (hyacinth),
and hence a precious stone of that colour (Rev. 21:20). It has
been supposed to designate the same stone as the ligure (Heb.
leshem) mentioned in Ex. 28:19 as the first stone of the third
row in the high priest's breast-plate. In Rev. 9:17 the word is
simply descriptive of colour.