Back to the Twelve Stones
Foundation 11 of 12
Revelation 21:20
Jacinth
ὑάκινθοςThe strongest light-splitter of the twelve: look through it and the far edges appear doubled. Visible in antiquity, unexplained until 1690.
Mineralogy
- Greek name
- hyakinthos (ὑάκινθος)
- Modern identification
- Zircon
- Chemical formula
- ZrSiO₄
- Crystal system
- Tetragonal
- Optical class
- Uniaxial (+)
- Birefringence (Δn)
- 0.036–0.059
- Refractive indices
- 1.810–1.987
- Color / appearance
- Reddish-orange to reddish-brown
Highest birefringence in the group; dramatic doubling visible to the naked eye.
The light between
Jacinth is anisotropic: enter it with a single ray of light and it leaves as two, split apart by the crystal's inner order. This is birefringence, the same property shared by every one of the twelve foundation stones, and by none of the cubic stones left out of the list.
In the high-priestly breastplate of Exodus 28, this position held Beryl in the Septuagint reckoning.
Hold the light in your hand
The Revelation Stones collection brings each foundation stone into the room with you, and the Light Between research explains what you are looking at.