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Entry № 170

Coquimbite

Hydrous Iron Sulphate

A lavender bloom from the Atacama.

Chakra

Crown · Third Eye

Element

Water · Fire

Zodiac

Aquarius · Pisces

Coquimbite

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

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Crackle Quartz

Clear quartz taught to hold light in fractures.