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Foundation 10 of 12
Revelation 21:20
Chrysoprase
χρυσόπρασονThe rarest chalcedony: nickel lends it apple-green, while the quartz beneath still divides the light.
Mineralogy
- Greek name
- chrysoprason (χρυσόπρασον)
- Modern identification
- Ni-Chalcedony
- Chemical formula
- SiO₂ + NiO
- Crystal system
- Trigonal
- Optical class
- Uniaxial (+)
- Birefringence (Δn)
- 0.004–0.009
- Refractive indices
- 1.530–1.539
- Color / appearance
- Apple green
Nickel-bearing variety; rarest chalcedony.
The light between
Chrysoprase 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 Chrysolite 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.