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Entry № 172

Crichtonite

Crichtonite

A black alpine gem for oxide-rich clefts.

Chakra

Root

Element

Earth

Zodiac

Capricorn · Scorpio

Crichtonite

I. The Metaphysical Reading

How the stone has been held.

Crichtonite is worked with as a stone of deep-ground authority, kept nearby during work that asks a person to stand quietly in complex territory. Practitioners hold it as a reminder that seriousness is not the same as heaviness.

Chakra
Root
Element
Earth
Zodiac
Capricorn · Scorpio
Keynote
A black alpine gem for oxide-rich clefts.

II. The Scientific Reading

What the lattice actually does.

Crichtonite is a rare complex titanate — a strontium-, manganese- and rare-earth-bearing iron-titanium oxide in the crichtonite group — that grows in high-pressure alpine-type fissures and in metamorphosed iron-titanium-rich rocks. Its dense heavy-element chemistry gives it a notably high density and refractive index for a non-metallic mineral.

Formula
Sr(Mn,Y,U)Fe²⁺₂(Ti,Fe³⁺,Cr,V)₁₈(O,OH)₃₈
System
Trigonal
Hardness
6 (Mohs)
Provenance
Switzerland (Alps — type locality Dauphiné), France, Norway, USA

References & Sources

Independent mineralogical references used to verify the scientific details above.

Mineral Profile

Fact Sheet

Chemical Formula
Sr(Mn,Y,U)Fe²⁺₂(Ti,Fe³⁺,Cr,V)₁₈(O,OH)₃₈
Crystal System
Trigonal
Mohs Hardness
6 (Mohs)
Density
4.5 – 4.8 g/cm³
Refractive Index
2.24 – 2.30
Provenance
Switzerland (Alps — type locality Dauphiné), France, Norway, USA
Color Origin
Jet-black rhombohedral crystals with a bright submetallic to adamantine lustre

Related Crystals

Stones that share this lattice

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Crystallised Orange Calcite

Warmth held in a rhombohedral cage.