Entry № 170
Coquimbite
Hydrous Iron Sulphate
A lavender bloom from the Atacama.
Chakra
Crown · Third Eye
Element
Water · Fire
Zodiac
Aquarius · Pisces

I. The Metaphysical Reading
How the stone has been held.
Coquimbite is treated as a delicate, high-vibration stone worked with in dream tending and gentle third-eye practice. Practitioners keep it under glass because it dislikes humidity, and hold it as a reminder that some kinds of clarity are only possible when the environment is protected.
- Chakra
- Crown · Third Eye
- Element
- Water · Fire
- Zodiac
- Aquarius · Pisces
- Keynote
- A lavender bloom from the Atacama.
II. The Scientific Reading
What the lattice actually does.
Coquimbite is a hydrated iron(III) sulphate, Fe₂(SO₄)₃·9H₂O, that forms as a secondary mineral through oxidation of pyrite in arid conditions — the Atacama Desert around Coquimbo is its type locality. It is water-soluble and slowly loses hydration in dry air, so specimens must be stored away from moisture and direct sunlight to preserve their lavender colour.
- Formula
- Fe₂(SO₄)₃·9H₂O
- System
- Trigonal (hexagonal)
- Hardness
- 2 – 2.5 (Mohs)
- Provenance
- Chile (Coquimbo — Tierra Amarilla, type locality), Bolivia, USA
References & Sources
Independent mineralogical references used to verify the scientific details above.
Mineral Profile
Fact Sheet
- Chemical Formula
- Fe₂(SO₄)₃·9H₂O
- Crystal System
- Trigonal (hexagonal)
- Mohs Hardness
- 2 – 2.5 (Mohs)
- Density
- 2.10 g/cm³
- Refractive Index
- 1.536 – 1.556
- Provenance
- Chile (Coquimbo — Tierra Amarilla, type locality), Bolivia, USA
- Color Origin
- Pale violet to lavender, occasionally colourless or yellowish
Related Crystals
Stones that share this lattice
Next in the Atlas
Crackle Quartz
Clear quartz taught to hold light in fractures.




