Jacinth (, ) or hyacinth () is a yellow-red to red-brown variety of

zircon Zircon () is a mineral belonging to the group of nesosilicates and is a source of the metal zirconium. Its chemical name is zirconium(IV) silicate, and its corresponding chemical formula is Zr SiO4. An empirical formula showing some of th ...

used as a gemstone. In

Exodus Exodus or the Exodus may refer to: Religion * Book of Exodus, second book of the Hebrew Torah and the Christian Bible * The Exodus, the biblical story of the migration of the ancient Israelites from Egypt into Canaan Historical events * Exo ...

28:19, one of the precious stones set into the ''

hoshen The priestly breastplate or breastpiece of judgment ( he, חֹשֶׁן ''ḥōšen'') was a sacred breastplate worn by the High Priest of the Israelites, according to the Book of Exodus. In the biblical account, the breastplate is termed the ''br ...

'' (the breastplate worn by the

High Priest of Israel High Priest ( he, כהן גדול, translit=Kohen Gadol or ; ) was the title of the chief religious official of Judaism from the early post-Exilic times until the destruction of the Second Temple in Jerusalem by the Romans in 70 CE. Previously ...

) is called, in Hebrew, '' leshem'', which is often translated into English as "jacinth". The true identity of this stone has been a source of confusion since at least the first century; the modern identification of ''leshem'' with jacinth seems to have been popularised by

Martin Luther Martin Luther (; ; 10 November 1483 – 18 February 1546) was a German priest, theologian, author, hymnwriter, and professor, and Augustinian friar. He is the seminal figure of the Protestant Reformation and the namesake of Luther ...

, who may in turn have been following a fourth-century tradition. In

Revelation In religion and theology, revelation is the revealing or disclosing of some form of truth or knowledge through communication with a deity or other supernatural entity or entities. Background Inspiration – such as that bestowed by God on th ...

21:20, one of the foundation stones of the

New Jerusalem In the Book of Ezekiel in the Hebrew Bible, New Jerusalem (, ''YHWH šāmmā'', YHWH sthere") is Ezekiel's prophetic vision of a city centered on the rebuilt Holy Temple, the Third Temple, to be established in Jerusalem, which would be the ...

is hyacinth (Greek: ''hyakinthos''). However, ''

Strong's Concordance ''The Exhaustive Concordance of the Bible'', generally known as ''Strong's Concordance'', is a Bible concordance, an index of every word in the King James Version (KJV), constructed under the direction of James Strong. Strong first published h ...

'' and ''Thayer's Greek Lexicon'' describe this as a stone of the colour of the hyacinth plant, i.e. dark blue. The stone intended may be the

sapphire Sapphire is a precious gemstone, a variety of the mineral corundum, consisting of aluminium oxide () with trace amounts of elements such as iron, titanium, chromium, vanadium, or magnesium. The name sapphire is derived via the Latin "sap ...

. In Revelation 9:17, the word appears in adjective form (''hyakinthinous'', "hyacinthine"); this, again, is thought to be descriptive of a blue or purple colour, with no reference to the modern jacinth stone.

References

{{Reflist Zirconium minerals Gemstones