Entry № 172
Crichtonite
Crichtonite
A black alpine gem for oxide-rich clefts.
Chakra
Root
Element
Earth
Zodiac
Capricorn · Scorpio

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
Next in the Atlas
Crystallised Orange Calcite
Warmth held in a rhombohedral cage.




