Entry № 334
Prophecy Stone
Iron oxide pseudomorph after marcasite
Angular desert iron, heavy in the hand.
Chakra
Third Eye · Root
Element
Earth · Fire
Zodiac
Scorpio · Aquarius

I. The Metaphysical Reading
How the stone has been held.
Prophecy stone is used, as its trade name suggests, in divinatory and visionary practice — held during meditation to steady attention on what is coming rather than what is feared. Its unusual weight is treated as a reminder to keep insight tethered to the body.
- Chakra
- Third Eye · Root
- Element
- Earth · Fire
- Zodiac
- Scorpio · Aquarius
- Keynote
- Angular desert iron, heavy in the hand.
II. The Scientific Reading
What the lattice actually does.
Prophecy stone is a limonite or goethite pseudomorph after marcasite from Cretaceous chalk of Egypt's White Desert. Original marcasite nodules oxidised in place, so the angular blocky external form of the sulphide is preserved while the interior converted to iron oxides and hydroxides. The high density relative to its size reflects that iron-rich composition.
- Formula
- FeO(OH) / Fe₂O₃ after FeS₂
- System
- Orthorhombic (pseudomorphic)
- Hardness
- 5 – 5.5 (Mohs)
- Provenance
- White Desert, Farafra Oasis, Egypt; Libya
References & Sources
Independent mineralogical references used to verify the scientific details above.
Mineral Profile
Fact Sheet
- Chemical Formula
- FeO(OH) / Fe₂O₃ after FeS₂
- Crystal System
- Orthorhombic (pseudomorphic)
- Mohs Hardness
- 5 – 5.5 (Mohs)
- Density
- 3.6 – 4.3 g/cm³
- Refractive Index
- Opaque
- Provenance
- White Desert, Farafra Oasis, Egypt; Libya
- Color Origin
- Brown, grey-brown, metallic bronze sheen
Related Crystals
Stones that share this lattice
Next in the Atlas
Purple Aragonite
Carbonate blades in an unlikely violet.




