Entry № 205
Gibbsite
Aluminium Hydroxide (γ-Al(OH)₃)
The pale mineral behind every aluminium object.
Chakra
Crown
Element
Earth · Water
Zodiac
Virgo · Aquarius

I. The Metaphysical Reading
How the stone has been held.
Gibbsite is worked with as a stone of quiet essential-ness, held by those who feel their contribution is unglamorous but structural. Practitioners keep it as a reminder that the material behind everyday tools deserves respect.
- Chakra
- Crown
- Element
- Earth · Water
- Zodiac
- Virgo · Aquarius
- Keynote
- The pale mineral behind every aluminium object.
II. The Scientific Reading
What the lattice actually does.
Gibbsite is a monoclinic aluminium hydroxide and the principal aluminium-bearing mineral in most bauxite ores. It forms as a residual weathering product in humid tropical climates, where prolonged leaching strips silica from parent rock and leaves aluminium behind as hydroxides. Its layered structure — sheets of Al(OH)₆ octahedra held together by hydrogen bonds — is also the structural template for the octahedral layer in many clay minerals.
- Formula
- Al(OH)₃
- System
- Monoclinic
- Hardness
- 2.5 – 3.5 (Mohs)
- Provenance
- Brazil, Guinea, Australia, Jamaica, USA (Arkansas)
References & Sources
Independent mineralogical references used to verify the scientific details above.
Mineral Profile
Fact Sheet
- Chemical Formula
- Al(OH)₃
- Crystal System
- Monoclinic
- Mohs Hardness
- 2.5 – 3.5 (Mohs)
- Density
- 2.30 – 2.40 g/cm³
- Refractive Index
- 1.568 – 1.587
- Provenance
- Brazil, Guinea, Australia, Jamaica, USA (Arkansas)
- Color Origin
- White, pale grey, cream, occasionally pale green or pink
Related Crystals
Stones that share this lattice
Next in the Atlas
Glauberite
An evaporite crystal that often dissolves and leaves its mould behind.




