From BiblePortal Wikipedia

Vine's Expository Dictionary of NT Words [1]

A — 1: Ὑάκινθος (Strong'S #5192 — Noun Masculine — huakinthos — hoo-ak'-in-thos )

primarily denoted "a hyacinth," probably the dark blue iris; then, "a precious stone," most likely the sapphire,  Revelation 21:20 .

B — 1: Ὑακίνθινος (Strong'S #5191 — Adjective — huakinthinos — hoo-ak-in'-thee-nos )

signifies "hyacinthine," perhaps primarily having the color of the hyacinth. Some regard its color as that of the martagon lily, a dusky red. According to Swete, the word in  Revelation 9:17 is "doubtless meant to describe the blue smoke of a sulphurous flame."

Hastings' Dictionary of the New Testament [2]

(ὑάκινθος, Ital. giacinto )

Jacinth, or hyacinth , is the colour of the eleventh foundation-stone of the New Jerusalem ( Revelation 21:20). The cuirasses of apocalyptic horsemen are partly hyacinthine ( Revelation 9:17). The ὑάκινθος of the ancients was probably our sapphire ( Revelation 21:20 [Revised Version margin]). The modern hyacinth, a variety of zircon, of yellowish red colour, may have been the stone known in Gr. as λογύριον and in Heb. as leshem (the Revised Versionof  Exodus 28:19;  Exodus 39:12 has ‘jacinth’ where the Authorized Versionhas ‘ligure’); but Flinders Petrie ( Hasting's Dictionary of the Bible (5 vols) iv. 620) suggests that the latter was yellow quartz or agate. Many Greek and Roman ‘hyacinths,’ used for intaglios and cameos, were probably only garnets.

James Strahan.

Fausset's Bible Dictionary [3]

("hyacinth".) A precious stone, a foundation of the New Jerusalem wall ( Revelation 21:20). Hebrew Leshem , "ligure" in the high priest's breast-plate ( Exodus 28:19). A red zircon, found in square prisms, varying from pale green to purple red. "Ligure" in Speaker's Commentary is explained by "amber," which, according to Pliny and Theophrastus, came from Liguria. Smith's Bible Dictionary says "ligurite is a crystallized mineral of a yellowish or apple-green hue found in Liguria, 'jacinth' seems identical with Hebrew Leshem) ." In  Revelation 9:17 the "breast-plates of jacinth" are of hyacinth color, the dark blue iris color answering to the "smoke out of their mouths." Pliny says (37:41), the violet brightness in the amethyst is diluted in the jacinth. Solinus makes the,jacinth our sapphire.

Smith's Bible Dictionary [4]

Jacinth. A precious stone, forming one of the foundations of the walls of the new Jerusalem.  Revelation 21:20. Called Hyacinth, in the Revised Version. This is simply a different English rendering of the same Greek original. It is probably identical with the lighure of  Exodus 28:19.

The jacinth or hyacinth is a red variety of Zircon, which is found in square prisms of a white, gray, red, reddish-brown, yellow or pale-green color. The expression in  Revelation 9:17, "of jacinth," is descriptive simply of a dark-purple color.

Morrish Bible Dictionary [5]

The word ὑάκινθος signifies hyacinth, and this, as a colour, is a deep purple. In  Revelation 9:17 the horsemen had breastplates of fire, jacinth, and brimstone, which seem to imply flashes of coloured light. In   Revelation 21:20 the jacinth garnishes the eleventh foundation of the heavenly Jerusalem. It is supposed by some to be the same as the ligure. The Greek word occurs in the LXX in  Exodus 25:4;  Exodus 26:1 , etc., but is translated 'blue.'

People's Dictionary of the Bible [6]

Jacinth or Hyacinth, "amber" margin R. V.  Exodus 28:19. Probably the same as the ligure, a gem of a yellowish-red or a dark purple color,  Revelation 9:17; called "sapphire" in margin of R. V.  Revelation 21:20. In the former passage there is reference merely to its color.

American Tract Society Bible Dictionary [7]

Or Hyacinth a gem of a yellowish red or hyacinth color, nearly related to zircon and to the amethyst. It loses its color by being heated, and resembles the diamond,  Revelation 9:17   21:20 .


Holman Bible Dictionary [8]

 Exodus 28:19 Revelation 9:17  Revelation 21:20Hyacinth

King James Dictionary [9]

JA'CINTH, n. a different orthography of Hyacinth.

1. A genus of plants. See Hyacinth. 2. A species of pellucid gems. See Hyacinth.  Revelation 21

Easton's Bible Dictionary [10]

 Revelation 21:20 Exodus 28:19  Revelation 9:17

Hastings' Dictionary of the Bible [11]

JACINTH . See Jewels and Precious Stones, p. 467 a .

Webster's Dictionary [12]

(n.) See Hyacinth.

Kitto's Popular Cyclopedia of Biblial Literature [13]

The stone which is called Jacinth in , is the same which is called in the Old Testament a Ligure [See LIGURE].